3551:
640:
41:
312:(RFCs), other specifications, and some additional codes used in some common applications of the HTTP. The first digit of the status code specifies one of five standard classes of responses. The optional message phrases shown are typical, but any human-readable alternative may be provided, or none at all.
787:
Indicates that the resource requested was previously in use but is no longer available and will not be available again. This should be used when a resource has been intentionally removed and the resource should be purged. Upon receiving a 410 status code, the client should not request the resource in
366:
An informational response indicates that the request was received and understood. It is issued on a provisional basis while request processing continues. It alerts the client to wait for a final response. The message consists only of the status line and optional header fields, and is terminated by an
725:
The request contained valid data and was understood by the server, but the server is refusing action. This may be due to the user not having the necessary permissions for a resource or needing an account of some sort, or attempting a prohibited action (e.g. creating a duplicate record where only one
414:
A WebDAV request may contain many sub-requests involving file operations, requiring a long time to complete the request. This code indicates that the server has received and is processing the request, but no response is available yet. This prevents the client from timing out and assuming the request
565:
Tells the client to look at (browse to) another URL. The HTTP/1.0 specification required the client to perform a temporary redirect with the same method (the original describing phrase was "Moved
Temporarily"), but popular browsers implemented 302 redirects by changing the method to GET. Therefore,
615:
In this case, the request should be repeated with another URI; however, future requests should still use the original URI. In contrast to how 302 was historically implemented, the request method is not allowed to be changed when reissuing the original request. For example, a POST request should be
927:
The origin server requires the request to be conditional. Intended to prevent the 'lost update' problem, where a client GETs a resource's state, modifies it, and PUTs it back to the server, when meanwhile a third party has modified the state on the server, leading to a
325:
All HTTP response status codes are separated into five classes or categories. The first digit of the status code defines the class of response, while the last two digits do not have any classifying or categorization role. There are five classes defined by the standard:
525:
A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD. A user agent may automatically redirect a request. A user agent should detect and intervene to prevent cyclical redirects.
672:
Similar to 403 Forbidden, but specifically for use when authentication is required and has failed or has not yet been provided. The response must include a WWW-Authenticate header field containing a challenge applicable to the requested resource. See
770:
The server timed out waiting for the request. According to HTTP specifications: "The client did not produce a request within the time that the server was prepared to wait. The client MAY repeat the request without modifications at any later
975:
Response status codes beginning with the digit "5" indicate cases in which the server is aware that it has encountered an error or is otherwise incapable of performing the request. Except when responding to a HEAD request, the server
726:
is allowed). This code is also typically used if the request provided authentication by answering the WWW-Authenticate header field challenge, but the server did not accept that authentication. The request should not be repeated.
816:
provided was too long for the server to process. Often the result of too much data being encoded as a query-string of a GET request, in which case it should be converted to a POST request. Called "Request-URI Too Long"
1526:
An error around authentication returned by a server registered with a load balancer. A listener rule is configured to authenticate users, but the identity provider (IdP) returned an error code when authenticating the
788:
the future. Clients such as search engines should remove the resource from their indices. Most use cases do not require clients and search engines to purge the resource, and a "404 Not Found" may be used instead.
3004:
1334:
IIS sometimes uses additional decimal sub-codes for more specific information, however these sub-codes only appear in the response payload and in documentation, not in the place of an actual HTTP status code.
441:
used. In a GET request, the response will contain an entity corresponding to the requested resource. In a POST request, the response will contain an entity describing or containing the result of the action.
2942:
2664:
382:
request). Sending a large request body to a server after a request has been rejected for inappropriate headers would be inefficient. To have a server check the request's headers, a client must send
1330:
when either a more efficient server is available or the server cannot access the users' mailbox. The client is expected to re-run the HTTP AutoDiscover operation to find a more appropriate server.
3370:
390:
status code in response before sending the body. If the client receives an error code such as 403 (Forbidden) or 405 (Method Not
Allowed) then it should not send the request's body. The response
3111:
666:
The server cannot or will not process the request due to an apparent client error (e.g., malformed request syntax, size too large, invalid request message framing, or deceptive request routing).
3388:
841:), but the server cannot supply that portion. For example, if the client asked for a part of the file that lies beyond the end of the file. Called "Requested Range Not Satisfiable" previously.
579:
using the GET method. When received in response to a POST (or PUT/DELETE), the client should presume that the server has received the data and should issue a new GET request to the given URI.
453:
The request has been accepted for processing, but the processing has not been completed. The request might or might not be eventually acted upon, and may be disallowed when processing occurs.
1935:
953:
A server operator has received a legal demand to deny access to a resource or to a set of resources that includes the requested resource. The code 451 was chosen as a reference to the novel
1001:
The server either does not recognize the request method, or it lacks the ability to fulfil the request. Usually this implies future availability (e.g., a new feature of a web-service API).
487:) due to a range header sent by the client. The range header is used by HTTP clients to enable resuming of interrupted downloads, or split a download into multiple simultaneous streams.
869:, and is not expected to be implemented by actual HTTP servers. The RFC specifies this code should be returned by teapots requested to brew coffee. This HTTP status is used as an
378:
The server has received the request headers and the client should proceed to send the request body (in the case of a request for which a body needs to be sent; for example, a
1508:
Client closed the connection with the load balancer before the idle timeout period elapsed. Typically, when client timeout is sooner than the
Elastic Load Balancer's timeout.
509:
The server has fulfilled a request for the resource, and the response is a representation of the result of one or more instance-manipulations applied to the current instance.
3396:
2974:
2837:
2454:
2788:
2368:
2154:
1551:
Since this "Warning" header is often neither sent by servers nor acknowledged by clients, this header and its codes were obsoleted by the HTTP Working Group in 2022 with
3914:
3008:
647:
This class of status code is intended for situations in which the error seems to have been caused by the client. Except when responding to a HEAD request, the server
1473:
Error 527 indicated an interrupted connection between
Cloudflare and the origin server's Railgun server. This error is obsolete as Cloudflare has deprecated Railgun.
1502:
Returned with an HTTP/2 GOAWAY frame if the compressed length of any of the headers exceeds 8K bytes or if more than 10K requests are served through one connection.
1425:
The origin server refused connections from
Cloudflare. Security solutions at the origin may be blocking legitimate connections from certain Cloudflare IP addresses.
651:
include an entity containing an explanation of the error situation, and whether it is a temporary or permanent condition. These status codes are applicable to any
2124:
2946:
1226:
The server has exceeded the bandwidth specified by the server administrator; this is often used by shared hosting providers to limit the bandwidth of customers.
3418:
2656:
595:
The requested resource is available only through a proxy, the address for which is provided in the response. For security reasons, many HTTP clients (such as
980:
include an entity containing an explanation of the error situation, and indicate whether it is a temporary or permanent condition. Likewise, user agents
877:"I'm a teapot" easter egg. Sometimes, this status code is also used as a response to a blocked request, instead of the more appropriate 403 Forbidden.
589:
If-Modified-Since or If-None-Match. In such case, there is no need to retransmit the resource since the client still has a previously-downloaded copy.
3658:
3340:
2426:
2210:
1927:
1566:
The response provided by a cache is stale (the content's age exceeds a maximum age set by a Cache-Control header or heuristically chosen lifetime).
1548:. Unlike the other status codes above, these were not sent as the response status in the HTTP protocol, but as part of the "Warning" HTTP header.
1073:
The client needs to authenticate to gain network access. Intended for use by intercepting proxies used to control access to the network (e.g., "
3831:
3323:
944:
The server is unwilling to process the request because either an individual header field, or all the header fields collectively, are too large.
865:
3291:
2431:
Any attempt to brew coffee with a teapot should result in the error code "418 I'm a teapot". The resulting entity body MAY be short and stout.
503:
The members of a DAV binding have already been enumerated in a preceding part of the (multistatus) response, and are not being included again.
3157:
518:
This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in
740:
A request method is not supported for the requested resource; for example, a GET request on a form that requires data to be presented via
3454:
3030:
2859:
319:
1596:
Added by a proxy if it applies any transformation to the representation, such as changing the content encoding, media type or the like.
2013:; Douglis, Fred; Krishnamurthy, Balachander; Goland, Yaron Y.; Hellerstein, Daniel M.; Feldmann, Anja; Mogul, Jeffrey (January 2002).
3261:
3107:
2098:
1192:
The
Microsoft extension code indicated when Windows Parental Controls are turned on and are blocking access to the requested webpage.
750:
The requested resource is capable of generating only content not acceptable according to the Accept headers sent in the request. See
2829:
3867:
2982:
2462:
1627:
1294:
Error 999 is used by LinkedIn and is related to being blocked/walled or unable to access their webpages without first signing in.
1141:
Returned by version 1 of the
Twitter Search and Trends API when the client is being rate limited; versions 1.1 and later use the
477:
The server successfully processed the request, asks that the requester reset its document view, and is not returning any content.
2505:
2360:
2158:
1802:
734:
The requested resource could not be found but may be available in the future. Subsequent requests by the client are permissible.
3919:
3862:
3826:
3489:
3183:
3048:
2577:
1892:
1710:
1617:
857:
3209:
2184:
1019:
The server cannot handle the request (because it is overloaded or down for maintenance). Generally, this is a temporary state.
3078:
2532:
287:
681:. 401 semantically means "unauthenticated", the user does not have valid authentication credentials for the target resource.
1304:
1278:
An error used by some HTTP proxies to signal a network connect timeout behind the proxy to a client in front of the proxy.
398:
header as it indicates that the server does not support expectations (this is the case, for example, of HTTP/1.0 servers).
1584:
The cache heuristically chose a freshness lifetime greater than 24 hours and the response's age is greater than 24 hours.
3651:
1010:
678:
230:
2132:
1103:
Used by Apache servers. A catch-all error condition allowing the passage of message bodies through the server when the
777:
Indicates that the request could not be processed because of conflict in the current state of the resource, such as an
3706:
883:
The request was directed at a server that is not able to produce a response (for example because of connection reuse).
674:
623:
576:
554:
301:
225:
995:
A generic error message, given when an unexpected condition was encountered and no more specific message is suitable.
3239:
2815:
1622:
1354:
Used internally to instruct the server to return no information to the client and close the connection immediately.
586:
132:
50:
3348:
1447:
Cloudflare was able to complete a TCP connection to the origin server, but did not receive a timely HTTP response.
806:
The request is larger than the server is willing or able to process. Previously called "Request Entity Too Large".
3893:
1825:
542:
2633:
430:
This class of status codes indicates the action requested by the client was received, understood, and accepted.
3821:
1454:
914:
828:
537:). For example, this code could be used to present multiple video format options, to list files with different
261:
1272:
Used by some HTTP proxies to signal a network read timeout behind the proxy to a client in front of the proxy.
3609:
3644:
860:
256:
1025:
The server was acting as a gateway or proxy and did not receive a timely response from the upstream server.
2723:
2266:
2058:
1495:
adds a few custom return codes to signal issues either with the client request or with the origin server.
1492:
1155:
717:
uses this code for failed payments where parameters were correct, for example blocked fraudulent payments.
497:
message and can contain a number of separate response codes, depending on how many sub-requests were made.
251:
3124:"Error message when you try to log on to Exchange 2007 by using Outlook Web Access: "440 Login Time-out""
1412:'s reverse proxy service expands the 5xx series of errors space to signal issues with the origin server.
689:
Reserved for future use. The original intention was that this code might be used as part of some form of
3749:
3726:
2206:
1150:
246:
465:) that received a 200 OK from its origin, but is returning a modified version of the origin's response.
3816:
901:
The request failed because it depended on another request and that request failed (e.g., a PROPPATCH).
800:
The server does not meet one of the preconditions that the requester put on the request header fields.
3721:
3589:
3503:
2816:"draft-ietf-webdav-protocol-05: Extensions for Distributed Authoring on the World Wide Web -- WEBDAV"
2743:
2703:
2599:
2410:
2294:
2078:
2030:
1981:
1906:
1845:
1732:
309:
3532:
3320:
3888:
3299:
1488:
1394:
response code, used when the client has made a HTTP request to a port listening for HTTPS requests.
1327:
1038:
824:
794:
The request did not specify the length of its content, which is required by the requested resource.
751:
534:
3754:
3686:
3149:
1371:
1097:
1042:
969:
870:
538:
305:
280:
3555:
3550:
1320:
The server cannot honour the request because the user has not provided the required information.
630:. So, for example, submitting a form to a permanently redirected resource may continue smoothly.
1870:
3883:
3711:
3701:
2867:
2591:
1724:
1632:
1572:
The cache was unable to validate the response, due to an inability to reach the origin server.
1216:
702:
600:
3841:
3795:
3579:
3569:
3493:
2889:
2733:
2693:
2581:
2400:
2284:
2068:
2020:
1971:
1896:
1835:
1714:
1660:
1552:
1541:
1514:
The load balancer received an X-Forwarded-For request header with more than 30 IP addresses.
1347:
web server software expands the 4xx error space to signal issues with the client's request.
1243:
1121:
1107:
setting is enabled. It is displayed in this situation instead of a 4xx or 5xx error message.
714:
55:
3627:
1077:" used to require agreement to Terms of Service before granting full Internet access via a
907:
Indicates that the server is unwilling to risk processing a request that might be replayed.
827:
which the server or resource does not support. For example, the client uploads an image as
3716:
3691:
3327:
3269:
2274:
2102:
2050:
2010:
1078:
519:
461:
404:
The requester has asked the server to switch protocols and the server has agreed to do so.
371:
send a 1xx response to an HTTP/1.0 compliant client except under experimental conditions.
166:
1590:
Arbitrary, non-specific warning. The warning text may be logged or presented to the user.
1463:
Cloudflare could not validate the SSL certificate on the origin web server. Also used by
1307:(IIS) web server expands the 4xx error space to signal errors with the client's request.
705:
API uses this status if a particular developer has exceeded the daily limit on requests.
3800:
2390:
2270:
1074:
955:
918:
437:
Standard response for successful HTTP requests. The actual response will depend on the
1798:
1266:
Used by
Shopify to indicate that the requested endpoint has been temporarily disabled.
1236:
in the SSLLabs server testing API to signal that the site can not process the request.
609:
No longer used. Originally meant "Subsequent requests should use the specified proxy."
3908:
3836:
3667:
1464:
1209:
1199:
935:
934:
The user has sent too many requests in a given amount of time. Intended for use with
889:
The request was well-formed (i.e., syntactically correct) but could not be processed.
874:
778:
585:
Indicates that the resource has not been modified since the version specified by the
273:
151:
3056:
2921:
2180:
1400:
Used when the client has closed the request before the server could send a response.
984:
display any included entity to the user. These response codes are applicable to any
3744:
3696:
3479:
3205:
3179:
3123:
2657:"What is the correct HTTP status code to send when a site is down for maintenance?"
2567:
2262:
2054:
1700:
1419:
The origin server returned an empty, unknown, or unexpected response to
Cloudflare.
1256:
Used by
Shopify to indicate that Cloudflare can't resolve the requested DNS record.
1057:
The server detected an infinite loop while processing the request (sent instead of
838:
761:
713:
uses this code when the store has not paid their fees and is temporarily disabled.
694:
690:
639:
484:
304:(HTTP) response status codes. Status codes are issued by a server in response to a
161:
156:
123:
3086:
566:
HTTP/1.1 added status codes 303 and 307 to distinguish between the two behaviours.
533:
Indicates multiple options for the resource from which the client may choose (via
367:
empty line. As the HTTP/1.0 standard did not define any 1xx status codes, servers
3790:
3681:
3592:
3573:
3519:
3515:
3506:
3483:
2746:
2727:
2706:
2687:
2611:
2602:
2571:
2422:
2413:
2394:
2346:
2342:
2338:
2334:
2330:
2326:
2322:
2318:
2314:
2310:
2306:
2297:
2278:
2081:
2062:
2033:
2014:
1997:
1993:
1984:
1965:
1909:
1886:
1857:
1848:
1829:
1780:
1776:
1772:
1768:
1764:
1760:
1756:
1752:
1748:
1744:
1735:
1704:
1664:
1556:
1545:
1051:
The server is unable to store the representation needed to complete the request.
741:
471:
The server successfully processed the request, and is not returning any content.
379:
141:
98:
3422:
3392:
3374:
3344:
1438:
1409:
1146:
2595:
1728:
709:
uses this code if an account does not have sufficient funds to start a call.
3235:
3153:
3127:
2510:
1537:
1176:
response code, when too many URLs are requested within a certain time frame.
698:
447:
The request has been fulfilled, resulting in the creation of a new resource.
146:
2099:"Mozilla Bugzilla Bug 187996: Strange behavior on 305 redirect, comment 13"
1384:
response code, used when a client certificate is required but not provided.
1067:
Further extensions to the request are required for the server to fulfil it.
847:
The server cannot meet the requirements of the Expect request-header field.
3231:
1288:
Used by Shopify to indicate that the request includes a JSON syntax error.
3785:
3780:
3775:
3770:
1612:
1004:
947:
850:
729:
720:
684:
569:
560:
548:
209:
204:
199:
194:
189:
184:
17:
3455:"Troubleshoot Your Application Load Balancers – Elastic Load Balancing"
2863:
1928:"Create request with POST, which response codes 200 or 201 and content"
1282:
1260:
1250:
1246:
web platform to indicate a site that has been frozen due to inactivity.
1180:
1169:
1162:
1135:
1111:
710:
706:
596:
315:
Unless otherwise stated, the status code is part of the HTTP standard.
3618:
2625:
2455:"New Google Easter Egg For SEO Geeks: Server Status 418, I'm A Teapot"
1117:
Used by the Laravel Framework when a CSRF Token is missing or expired.
40:
3584:
3498:
2793:
2738:
2698:
2586:
2405:
2289:
2232:
2073:
2025:
1976:
1967:
HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV)
1901:
1840:
1719:
1578:
The cache is intentionally disconnected from the rest of the network.
1233:
1220:
1145:
response code instead. The phrase "Enhance your calm" comes from the
1128:
408:
1212:. Code 499 indicates that a token is required but was not submitted.
1013:
or proxy and received an invalid response from the upstream server.
701:, but that has not yet happened, and this code is not widely used.
345:– further action needs to be taken in order to complete the request
2537:
1437:
Cloudflare could not reach the origin server; for example, if the
1344:
638:
60:
3636:
2533:"I Went to a Russian Website and All I Got Was This Lousy Teapot"
1031:
The server does not support the HTTP version used in the request.
339:– the request was successfully received, understood, and accepted
2484:
2441:
1520:
Incompatible protocol versions between Client and Origin server.
1186:
Used by Shopify to signal that the request was deemed malicious.
1127:
A deprecated response status proposed during the development of
985:
652:
438:
118:
113:
108:
103:
93:
88:
83:
74:
65:
32:
3640:
421:
Used to return some response headers before final HTTP message.
1828:; Faizi, Asad; Carter, Steve R.; Jensen, Del (February 1999).
813:
494:
831:, but the server requires that images use a different format.
622:
This and all future requests should be directed to the given
553:
This and all future requests should be directed to the given
322:(IANA) maintains the official registry of HTTP status codes.
2789:"framework/src/Illuminate/Foundation/Exceptions/Handler.php"
1370:
response code, used when the client has provided an invalid
1202:. Code 498 indicates an expired or otherwise invalid token.
2125:"The GNU Taler tutorial for PHP Web shop developers 0.4.0"
394:
indicates that the request should be repeated without the
3554: This article incorporates text available under the
1799:"Hypertext Transfer Protocol (HTTP) Status Code Registry"
913:
The client should switch to a different protocol such as
357:– the server failed to fulfil an apparently valid request
2361:"HTTP/1.1 Status Codes 400 and 417, cannot choose which"
856:
This code was defined in 1998 as one of the traditional
351:– the request contains bad syntax or cannot be fulfilled
3610:
Hypertext Transfer Protocol (HTTP) Status Code Registry
2763:
1314:
The client's session has expired and must log in again.
1092:
The following codes are not specified by any standard.
575:
The response to the request can be found under another
1360:
Client sent too large request or too long header line.
1131:
used by the Spring Framework when a method has failed.
1269:
598 (Informal convention) Network read timeout error
1189:
450 Blocked by Windows Parental Controls (Microsoft)
483:
The server is delivering only part of the resource (
3876:
3850:
3809:
3763:
3737:
3674:
2396:
Hyper Text Coffee Pot Control Protocol (HTCPCP/1.0)
1793:
1791:
1789:
1154:, and its association with this number is likely a
760:The client must first authenticate itself with the
2890:"HTTP Status Codes and SEO: what you need to know"
1831:HTTP Extensions for Distributed Authoring – WEBDAV
1431:Cloudflare timed out contacting the origin server.
456:203 Non-Authoritative Information (since HTTP/1.1)
3449:
3447:
3445:
3443:
3441:
3439:
1602:Same as 199, but indicating a persistent warning.
386:as a header in its initial request and receive a
3371:"Error 520: web server returns an unknown error"
2726:; Leach, Paul; Lawrence, Scott (February 2000).
1659:represent interpretation guidelines as given by
837:The client has asked for a portion of the file (
308:made to the server. It includes codes from IETF
3485:Hypertext Transfer Protocol (HTTP/1.1): Caching
2764:"218 This is fine – HTTP status code explained"
2626:"An HTTP Status Code to Report Legal Obstacles"
1703:; M. Nottingham; J. Reschke, eds. (June 2022).
1441:for the origin server are incorrect or missing.
493:The message body that follows is by default an
2916:
2914:
2912:
2910:
1479:Error 530 is returned along with a 1xxx error.
1070:511 Network Authentication Required (RFC 6585)
941:431 Request Header Fields Too Large (RFC 6585)
895:The resource that is being accessed is locked.
333:– the request was received, continuing process
3652:
3389:"527 Error: Railgun Listener to origin error"
2922:"Shopify API response status and error codes"
2686:Holtman, Koen; Mutz, Andrew H. (March 1998).
281:
8:
1540:related warning codes were specified under
1048:507 Insufficient Storage (WebDAV; RFC 4918)
744:, or a PUT request on a read-only resource.
459:The server is a transforming proxy (e.g. a
3659:
3645:
3637:
2561:
2559:
2557:
2555:
2257:
2255:
2253:
561:302 Found (Previously "Moved temporarily")
288:
274:
28:
3583:
3497:
3482:; M. Nottingham; J. Reschke (June 2014).
3049:"Platform Considerations | Pantheon Docs"
2969:
2967:
2737:
2697:
2585:
2404:
2288:
2072:
2024:
1975:
1959:
1957:
1955:
1953:
1900:
1839:
1718:
1695:
1693:
1691:
1689:
1687:
1685:
1683:
659:display any included entity to the user.
626:. 308 parallel the behaviour of 301, but
3915:Hypertext Transfer Protocol status codes
2506:"Enable extra web security on a website"
1888:An HTTP Status Code for Indicating Hints
1416:520 Web Server Returned an Unknown Error
898:424 Failed Dependency (WebDAV; RFC 4918)
628:does not allow the HTTP method to change
415:was lost. The status code is deprecated.
2689:Transparent Content Negotiation in HTTP
2280:Hypertext Transfer Protocol -- HTTP/1.1
2064:Hypertext Transfer Protocol -- HTTP/1.0
1679:
1644:
612:307 Temporary Redirect (since HTTP/1.1)
500:208 Already Reported (WebDAV; RFC 5842)
238:
217:
174:
131:
73:
31:
1805:from the original on December 11, 2011
1034:506 Variant Also Negotiates (RFC 2295)
959:(see the Acknowledgements in the RFC).
866:Hyper Text Coffee Pot Control Protocol
781:between multiple simultaneous updates.
3399:from the original on October 13, 2016
2860:"Twitter Error Codes & Responses"
2840:from the original on October 25, 2015
2667:from the original on October 11, 2016
2427:April Fools' Day Request for Comments
2371:from the original on October 10, 2015
2155:"Google API Standard Error Responses"
1938:from the original on October 11, 2016
1651:Emphasised words and phrases such as
1161:430 Request Header Fields Too Large (
697:scheme, as proposed, for example, by
7:
3330:(http_rewrite module) documentation.
3160:from the original on October 5, 2009
3079:"HTTP status codes – ascii-code.com"
1599:299 Miscellaneous Persistent Warning
1054:508 Loop Detected (WebDAV; RFC 5842)
924:428 Precondition Required (RFC 6585)
616:repeated using another POST request.
3614:Internet Assigned Numbers Authority
3186:from the original on March 26, 2015
1387:497 HTTP Request Sent to HTTPS Port
490:207 Multi-Status (WebDAV; RFC 4918)
320:Internet Assigned Numbers Authority
3242:from the original on April 9, 2009
3232:"The HTTP status codes in IIS 7.0"
3212:from the original on July 31, 2014
3150:"2.2.6 449 Retry With Status Code"
3005:"HTTP Error Codes and Quick Fixes"
2975:"Using token-based authentication"
2636:from the original on March 4, 2016
2453:Barry Schwartz (August 26, 2014).
2213:from the original on July 25, 2018
2187:from the original on July 10, 2018
1964:Dusseault, Lisa, ed. (June 2007).
25:
3007:. Docs.cpanel.net. Archived from
1532:Caching warning codes (obsoleted)
1453:Cloudflare could not negotiate a
1275:599 Network Connect Timeout Error
948:451 Unavailable For Legal Reasons
757:407 Proxy Authentication Required
210:451 Unavailable for Legal Reasons
3868:List of SMTP server return codes
3549:
3514:sec. 5.5. Obsoleted by RFC
1628:List of SMTP server return codes
1179:430 Shopify Security Rejection (
931:429 Too Many Requests (RFC 6585)
535:agent-driven content negotiation
39:
3863:List of FTP server return codes
3490:Internet Engineering Task Force
3031:"SSL Labs API v3 Documentation"
2578:Internet Engineering Task Force
2233:"Stripe API Reference – Errors"
2101:. March 3, 2003. Archived from
1711:Internet Engineering Task Force
1618:List of FTP server return codes
603:) do not obey this status code.
218:Security access control methods
3341:"Troubleshooting: Error Pages"
1215:509 Bandwidth Limit Exceeded (
1168:A deprecated response used by
1028:505 HTTP Version Not Supported
592:305 Use Proxy (since HTTP/1.1)
1:
3292:"ngx_http_special_response.c"
3180:"MS-ASCMD, Section 3.1.5.2.2"
1885:Oku, Kazuho (December 2017).
1875:102 status code is deprecated
1305:Internet Information Services
1299:Internet Information Services
1041:for the request results in a
972:failed to fulfill a request.
892:423 Locked (WebDAV; RFC 4918)
3578:. June 2022. sec. 5.5.
2836:. org.springframework.http.
2573:Additional HTTP Status Codes
1470:527 Railgun Error (obsolete)
1377:496 SSL Certificate Required
1357:494 Request header too large
679:Digest access authentication
231:Digest access authentication
3298:. nginx inc. Archived from
3268:. nginx inc. Archived from
2729:An HTTP Extension Framework
2181:"Sipgate API Documentation"
1871:"102 Processing – HTTP MDN"
1460:526 Invalid SSL Certificate
1064:510 Not Extended (RFC 2774)
1009:The server was acting as a
675:Basic access authentication
302:Hypertext Transfer Protocol
226:Basic access authentication
3936:
3522:.
2943:"Screenshot of error page"
2624:Bray, T. (February 2016).
2614:.
2349:.
2000:.
1860:.
1783:.
1623:List of HTTP header fields
1593:214 Transformation Applied
1575:112 Disconnected Operation
1484:AWS Elastic Load Balancing
1259:540 Temporarily Disabled (
873:in some websites, such as
820:415 Unsupported Media Type
418:103 Early Hints (RFC 8297)
362:1xx informational response
331:1xx informational response
3894:2024 CrowdStrike incident
3858:List of HTTP status codes
3628:MDN status code reference
2732:. Network Working Group.
2692:. Network Working Group.
2399:. Network Working Group.
2283:. Network Working Group.
2067:. Network Working Group.
2019:. Network Working Group.
1970:. Network Working Group.
1834:. Network Working Group.
1587:199 Miscellaneous Warning
1434:523 Origin Is Unreachable
1397:499 Client Closed Request
1363:495 SSL Certificate Error
1205:499 Token Required (Esri)
992:500 Internal Server Error
886:422 Unprocessable Content
834:416 Range Not Satisfiable
823:The request entity has a
543:word-sense disambiguation
3822:Bad command or file name
1581:113 Heuristic Expiration
1450:525 SSL Handshake Failed
1428:522 Connection Timed Out
1391:
1381:
1367:
1195:498 Invalid Token (Esri)
1173:
1142:
1058:
904:425 Too Early (RFC 8470)
262:HTTP parameter pollution
239:Security vulnerabilities
3296:nginx 1.9.5 source code
3266:nginx 1.9.5 source code
2724:Nielsen, Henrik Frystyk
2265:; J. Gettys; J. Mogul;
2207:"Shopify Documentation"
1569:111 Revalidation Failed
1457:with the origin server.
1134:420 Enhance Your Calm (
1016:503 Service Unavailable
880:421 Misdirected Request
797:412 Precondition Failed
401:101 Switching Protocols
257:HTTP response splitting
3920:Internet-related lists
3764:Device and data errors
3533:"Warning – HTTP | MDN"
3326:March 1, 2018, at the
3208:. Msdn.microsoft.com.
3182:. Msdn.microsoft.com.
2979:ArcGIS Server SOAP SDK
2866:. 2014. Archived from
2333:. Updated by RFC
2305:Obsoleted by RFC
2157:. 2016. Archived from
2016:Delta encoding in HTTP
1856:Obsoleted by RFC
1493:Elastic Load Balancing
1444:524 A Timeout Occurred
1422:521 Web Server Is Down
1281:783 Unexpected Token (
1249:530 Origin DNS Error (
1229:529 Site is overloaded
844:417 Expectation Failed
737:405 Method Not Allowed
644:
643:404 error on Wikimedia
619:308 Permanent Redirect
506:226 IM Used (RFC 3229)
392:417 Expectation Failed
252:HTTP request smuggling
3750:Fatal exception error
3537:developer.mozilla.org
3518:. Obsoletes RFC
3272:on September 19, 2017
2985:on September 26, 2014
2870:on September 27, 2017
2329:. Obsoletes RFC
1996:. Obsoletes RFC
1926:Stewart, Mark; djna.
1741:Internet Standard 97.
1563:110 Response is Stale
1174:429 Too Many Requests
1156:reference to cannabis
1143:429 Too Many Requests
803:413 Payload Too Large
642:
549:301 Moved Permanently
247:HTTP header injection
185:301 Moved Permanently
176:Response status codes
3262:"ngx_http_request.h"
3011:on November 23, 2015
2465:on November 15, 2015
2421:Updated by RFC
1992:Updated by RFC
1390:An expansion of the
1380:An expansion of the
1366:An expansion of the
1120:420 Method Failure (
1059:208 Already Reported
910:426 Upgrade Required
853:(RFC 2324, RFC 7168)
685:402 Payment Required
530:300 Multiple Choices
384:Expect: 100-continue
310:Request for Comments
3889:Windows wait cursor
3827:Halt and Catch Fire
3817:Abort, Retry, Fail?
3738:Application failure
3623:http-statuscode.com
3459:docs.aws.amazon.com
2135:on November 8, 2017
1779:. Updates RFC
1743:Obsoletes RFC
1489:Amazon Web Services
1328:Exchange ActiveSync
1105:ProxyErrorOverride
1039:content negotiation
1022:504 Gateway Timeout
998:501 Not Implemented
791:411 Length Required
767:408 Request Timeout
752:Content negotiation
539:filename extensions
480:206 Partial Content
3755:Segmentation fault
3687:Fatal system error
3512:Proposed Standard.
3321:"return" directive
3089:on January 7, 2017
3083:www.ascii-code.com
3059:on January 6, 2017
2608:Proposed Standard.
2459:Search Engine Land
2039:Proposed Standard.
1990:Proposed Standard.
1854:Proposed Standard.
1613:Custom error pages
1372:client certificate
1311:440 Login Time-out
1239:530 Site is frozen
1110:419 Page Expired (
1098:Apache HTTP Server
1096:218 This is fine (
1043:circular reference
861:April Fools' jokes
747:406 Not Acceptable
645:
300:This is a list of
3902:
3901:
3884:Spinning pinwheel
3707:Red Ring of Death
3702:Linux kernel oops
3619:HTTP status codes
3238:. July 14, 2009.
2830:"Enum HttpStatus"
2610:Updates RFC
2485:"Google's Teapot"
2393:(April 1, 1998).
2105:on April 21, 2014
1633:Common Log Format
1455:SSL/TLS handshake
1217:Apache Web Server
1210:ArcGIS for Server
1200:ArcGIS for Server
1172:, instead of the
964:5xx server errors
703:Google Developers
635:4xx client errors
601:Internet Explorer
474:205 Reset Content
298:
297:
16:(Redirected from
3927:
3842:Does not compute
3796:Not a typewriter
3661:
3654:
3647:
3638:
3597:
3596:
3587:
3585:10.17487/RFC9111
3566:
3560:
3553:
3547:
3545:
3543:
3529:
3523:
3510:
3501:
3499:10.17487/RFC7234
3476:
3470:
3469:
3467:
3465:
3451:
3434:
3433:
3431:
3429:
3415:
3409:
3408:
3406:
3404:
3385:
3379:
3378:
3367:
3361:
3360:
3358:
3356:
3351:on March 4, 2016
3347:. Archived from
3337:
3331:
3318:
3312:
3311:
3309:
3307:
3288:
3282:
3281:
3279:
3277:
3258:
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3146:
3140:
3139:
3137:
3135:
3120:
3114:
3105:
3099:
3098:
3096:
3094:
3085:. Archived from
3075:
3069:
3068:
3066:
3064:
3055:. Archived from
3045:
3039:
3038:
3027:
3021:
3020:
3018:
3016:
3001:
2995:
2994:
2992:
2990:
2981:. Archived from
2971:
2962:
2961:
2959:
2957:
2951:
2945:. Archived from
2939:
2933:
2932:
2930:
2928:
2918:
2905:
2904:
2902:
2900:
2886:
2880:
2879:
2877:
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2856:
2850:
2849:
2847:
2845:
2834:Spring Framework
2826:
2820:
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2812:
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2801:
2785:
2779:
2778:
2776:
2774:
2760:
2754:
2750:
2741:
2739:10.17487/RFC2774
2720:
2714:
2710:
2701:
2699:10.17487/RFC2295
2683:
2677:
2676:
2674:
2672:
2652:
2646:
2645:
2643:
2641:
2621:
2615:
2606:
2589:
2587:10.17487/RFC6585
2563:
2550:
2549:
2547:
2545:
2529:
2523:
2522:
2520:
2518:
2502:
2496:
2495:
2493:
2491:
2481:
2475:
2474:
2472:
2470:
2461:. Archived from
2450:
2444:
2439:
2433:
2417:
2408:
2406:10.17487/RFC2324
2387:
2381:
2380:
2378:
2376:
2356:
2350:
2301:
2292:
2290:10.17487/RFC2616
2259:
2248:
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2243:
2229:
2223:
2222:
2220:
2218:
2203:
2197:
2196:
2194:
2192:
2177:
2171:
2170:
2168:
2166:
2151:
2145:
2144:
2142:
2140:
2131:. Archived from
2121:
2115:
2114:
2112:
2110:
2095:
2089:
2085:
2076:
2074:10.17487/RFC1945
2047:
2041:
2037:
2028:
2026:10.17487/RFC3229
2011:Hoff, Arthur van
2007:
2001:
1988:
1979:
1977:10.17487/RFC4918
1961:
1948:
1947:
1945:
1943:
1923:
1917:
1913:
1904:
1902:10.17487/RFC8297
1882:
1876:
1874:
1873:. July 25, 2023.
1867:
1861:
1852:
1843:
1841:10.17487/RFC2518
1824:Goland, Yaronn;
1821:
1815:
1814:
1812:
1810:
1795:
1784:
1739:
1722:
1720:10.17487/RFC9110
1697:
1667:
1649:
1523:561 Unauthorized
1291:999 Non-standard
1244:Pantheon Systems
1122:Spring Framework
1106:
1088:Unofficial codes
851:418 I'm a teapot
809:414 URI Too Long
669:401 Unauthorized
606:306 Switch Proxy
582:304 Not Modified
572:(since HTTP/1.1)
541:, or to suggest
407:102 Processing (
397:
393:
389:
385:
355:5xx server error
349:4xx client error
306:client's request
290:
283:
276:
43:
29:
21:
3935:
3934:
3930:
3929:
3928:
3926:
3925:
3924:
3905:
3904:
3903:
3898:
3872:
3846:
3805:
3759:
3733:
3717:Screen of death
3692:Guru Meditation
3670:
3665:
3606:
3601:
3600:
3568:
3567:
3563:
3541:
3539:
3531:
3530:
3526:
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3400:
3387:
3386:
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3369:
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3364:
3354:
3352:
3339:
3338:
3334:
3328:Wayback Machine
3319:
3315:
3305:
3303:
3290:
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3014:
3012:
3003:
3002:
2998:
2988:
2986:
2973:
2972:
2965:
2955:
2953:
2952:on May 11, 2013
2949:
2941:
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2926:
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2920:
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2898:
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2888:
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2680:
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2668:
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2623:
2622:
2618:
2566:M. Nottingham;
2565:
2564:
2553:
2543:
2541:
2531:
2530:
2526:
2516:
2514:
2504:
2503:
2499:
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2452:
2451:
2447:
2440:
2436:
2389:
2388:
2384:
2374:
2372:
2358:
2357:
2353:
2277:(August 1999).
2261:
2260:
2251:
2241:
2239:
2231:
2230:
2226:
2216:
2214:
2205:
2204:
2200:
2190:
2188:
2179:
2178:
2174:
2164:
2162:
2161:on May 25, 2017
2153:
2152:
2148:
2138:
2136:
2123:
2122:
2118:
2108:
2106:
2097:
2096:
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2009:
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1963:
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1681:
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1646:
1641:
1609:
1534:
1486:
1407:
1392:400 Bad Request
1382:400 Bad Request
1368:400 Bad Request
1351:444 No Response
1341:
1301:
1104:
1090:
1075:captive portals
1005:502 Bad Gateway
966:
917:, given in the
863:, in RFC 2324,
663:400 Bad Request
637:
597:Mozilla Firefox
587:request headers
520:URL redirection
516:
514:3xx redirection
462:Web accelerator
428:
395:
391:
387:
383:
364:
343:3xx redirection
294:
167:X-Forwarded-For
75:Request methods
23:
22:
15:
12:
11:
5:
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3813:
3811:
3807:
3806:
3804:
3803:
3801:PC LOAD LETTER
3798:
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3709:
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3676:
3675:System failure
3672:
3671:
3668:Error messages
3666:
3664:
3663:
3656:
3649:
3641:
3635:
3634:
3625:
3616:
3605:
3604:External links
3602:
3599:
3598:
3561:
3524:
3471:
3435:
3410:
3380:
3362:
3332:
3313:
3302:on May 8, 2018
3283:
3253:
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3197:
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3141:
3115:
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2996:
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2881:
2851:
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2807:
2780:
2755:
2715:
2678:
2661:Stack Overflow
2647:
2616:
2570:(April 2012).
2551:
2524:
2497:
2476:
2445:
2434:
2419:Informational.
2382:
2351:
2275:T. Berners-Lee
2249:
2224:
2198:
2172:
2146:
2129:docs.taler.net
2116:
2090:
2087:Informational.
2042:
2002:
1949:
1932:Stack Overflow
1918:
1877:
1862:
1826:Whitehead, Jim
1816:
1785:
1731:. STD 97.
1706:HTTP Semantics
1678:
1677:
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1668:
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1564:
1536:The following
1533:
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1332:
1331:
1324:
1321:
1318:
1317:449 Retry With
1315:
1312:
1300:
1297:
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1151:Demolition Man
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3697:Kernel panic
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3575:HTTP Caching
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3556:CC BY-SA 2.5
3548:
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3536:
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3132:. Retrieved
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3108:Seen in 2017
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3093:December 23,
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1807:. Retrieved
1801:. Iana.org.
1740:
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1487:
1467:'s gorouter.
1408:
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1333:
1323:451 Redirect
1303:Microsoft's
1302:
1242:Used by the
1208:Returned by
1198:Returned by
1149:
1091:
1037:Transparent
974:
967:
954:
875:Google.com's
864:
839:byte serving
774:409 Conflict
695:micropayment
691:digital cash
646:
524:
517:
485:byte serving
450:202 Accepted
429:
388:100 Continue
375:100 Continue
365:
354:
348:
342:
336:
330:
324:
317:
314:
299:
175:
157:HTTP referer
26:
3791:lp0 on fire
3632:mozilla.org
3480:R. Fielding
3428:November 1,
3419:"Error 530"
3403:October 12,
3164:October 26,
3053:pantheon.io
3015:October 15,
2956:October 11,
2894:ContentKing
2874:January 20,
2844:October 16,
2671:October 16,
2568:R. Fielding
2490:October 23,
2469:November 4,
2391:L. Masinter
2375:October 16,
2365:serverFault
2271:L. Masinter
2263:R. Fielding
2242:October 28,
2139:October 29,
2055:R. Fielding
1942:October 16,
1701:R. Fielding
1439:DNS records
817:previously.
444:201 Created
426:2xx success
411:; RFC 2518)
56:Compression
51:Persistence
3909:Categories
3542:August 15,
3423:Cloudflare
3393:Cloudflare
3375:Cloudflare
3355:January 9,
3345:Cloudflare
3306:January 9,
3276:January 9,
3216:January 8,
3190:January 8,
3063:January 5,
3035:github.com
2267:H. Frystyk
2237:stripe.com
2059:H. Frystyk
1809:January 8,
1674:References
1410:Cloudflare
1405:Cloudflare
1147:1993 movie
1114:Framework)
950:(RFC 7725)
871:Easter egg
825:media type
3682:Bomb icon
3570:"Warning"
3236:Microsoft
3154:Microsoft
3128:Microsoft
2899:August 9,
2752:Historic.
2596:2070-1721
2511:DreamHost
2303:Obsolete.
1729:2070-1721
928:conflict.
699:GNU Taler
190:302 Found
3832:HTTP 418
3786:HTTP 500
3781:HTTP 404
3776:HTTP 403
3771:HTTP 402
3558:license.
3492:(IETF).
3397:Archived
3324:Archived
3246:April 1,
3240:Archived
3210:Archived
3184:Archived
3158:Archived
3156:. 2009.
2838:Archived
2773:July 25,
2768:HTTP.dev
2665:Archived
2640:March 7,
2634:Archived
2630:ietf.org
2369:Archived
2217:July 25,
2211:Archived
2191:July 10,
2185:Archived
2165:June 21,
1936:Archived
1803:Archived
1607:See also
1326:Used in
1232:Used by
938:schemes.
784:410 Gone
369:must not
152:Location
18:HTTP 415
3877:Related
3712:Sad Mac
3612:at the
3464:May 17,
2864:Twitter
2109:May 21,
1538:caching
1283:Shopify
1261:Shopify
1251:Shopify
1181:Shopify
1170:Shopify
1163:Shopify
1136:Twitter
1112:Laravel
1011:gateway
915:TLS/1.3
711:Shopify
707:Sipgate
119:CONNECT
84:OPTIONS
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