119:
240:
This recommendation describes the principles, criteria, and procedures for the assignment and reclamation of resources within a shared E.164 country code for groups of countries. These shared country codes will coexist with all other E.164-based country codes assigned by the ITU. The resource of the
272:
of calls. Annex A provides additional information on the structure and function of E.164 numbers. Annex B provides information on network identification, service parameters, calling/connected line identity, dialing procedures, and addressing for
Geographic-based
166:. Plan-conforming telephone numbers are limited to only digits and to a maximum of fifteen digits. The specification divides the digit string into a country code of one to three digits, and the subscriber telephone number of a maximum of twelve digits.
470:(PSTN). The early PSTN collected routing digits from users (e.g. on a dial pad), signaled those digits to each telephony switch, and used the numbers to determine how to ultimately reach the called party.
567:. When a number is mapped, a DNS query may be used to locate the service facilities on the Internet that accept and process telephone calls to the owner of record of the number, using, for example, the
579:
are similar in format (user@domain...) to e-mail addresses. This allows a direct, end-to-end
Internet connection without passing through the public switched telephone network.
228:
This recommendation contains the criteria and procedures for an applicant to be temporarily assigned a three-digit identification code within the shared E.164 country code
249:(CC + GIC) and provides the capability for a group of countries to provide telecommunication services within the group. The Secretariat of the ITU Standardization Sector (
750:"E.164.3 : Principles, criteria and procedures for the assignment and reclamation of E.164 country codes and associated identification codes for groups of countries"
481:
provides guidance when printing E.164 telephone numbers. This format includes the recommendation of prefixing international telephone numbers with a plus sign (
220:(IC) assignments. The criteria and procedures are provided as a basis for the effective and efficient utilization of the available E.164 numbering resources.
280:
The number categories are all based on a fifteen-digit numbering space. Before 1997, only twelve digits were allowed. The definition does not include any
692:"E.164.1 : Criteria and procedures for the reservation, assignment and reclamation of E.164 country codes and associated identification codes (ICs)"
261:
The E.164 recommendation provides the telephone number structure and functionality for five categories of telephone numbers used in international public
899:
216:
This recommendation describes the procedures and criteria for the reservation, assignment, and reclamation of E.164 country codes and associated
493:
833:
467:
201:
152:
268:
For each of the categories, it details the components of the numbering structure and the digit analysis required for successful
784:
598:
170:
825:
Implementing Cisco
Unified Communications Manager, Part 2 (CIPT2) Foundation Learning Guide: (CCNP Voice CIPT2 642-457)
568:
281:
889:
749:
728:
699:
156:
641:
670:
543:
525:
148:
136:
253:), the Telecommunication Standardization Bureau (TSB) is responsible for the assignment of the CC + GIC.
277:
calls. Specific E.164-based applications which differ in usage are defined in separate recommendations.
169:
Alternative formats (with area codes and country specific numbers) are available. Any country-specific
857:
894:
862:
798:
497:
489:
482:
284:, necessary for a call to reach international circuits from inside the country of call origination.
208:. E.163 was withdrawn, and some recommendations were incorporated into revision 1 of E.164 in 1997.
874:
535:
262:
829:
823:
588:
479:
Notation for national and international telephone numbers, e-mail addresses and web addresses
788:
778:
505:
163:
550:
using a reverse sequence of subdomains for each digit. For example, the telephone number
870:
Numbering plan for the international telephone service (E.163) (incorporated in E.164)
883:
530:
Some national telephone administrations and telephone companies have implemented an
534:-based database for their numbering spaces. E.164 numbers may be registered in the
118:
504:
format of an E.164 number, and is defined in the
Internet Engineering Task Force
858:
List of ITU-T Recommendation E.164 assigned country codes as of 15 December 2016
801:
576:
547:
509:
176:
The title of the original version and first revision of the E.164 standard was
513:
863:
List of ITU-T Recommendation E.164 Dialling
Procedures as of 15 December 2011
197:
100:
610:
539:
531:
757:
720:
691:
634:"E.164 : The international public telecommunication numbering plan"
633:
269:
126:
110:
869:
852:
662:
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to reach an international circuit in the country of call origination.
793:
663:"E.163 : Numbering plan for the international telephone service"
232:
for the purpose of conducting an international non-commercial trial.
17:
229:
593:
496:, in place of the plus sign. The number is presented starting the
474:
250:
193:
140:
117:
90:
86:
68:
546:(ENUM). In the system, any telephone number may be mapped into a
542:
in which the second-level domain e164.arpa has been reserved for
204:(PSTN). In the United States, this was formerly referred to as a
572:
378:
maximum 12 digits − number of digits in the identification code
274:
466:
E.164 numbers were originally defined for use in the worldwide
853:
488:
The presentation of a telephone number with the plus sign (
309:
maximum 15 digits − number of digits in the country code
145:
The international public telecommunication numbering plan
36:
The international public telecommunication numbering plan
721:"E.164.2 : E.164 numbering resources for trials"
492:) indicates that the number should be dialed with an
106:
96:
82:
74:
64:
56:
48:
40:
162:E.164 defines a general format for international
8:
485:) and using only spaces for digit grouping.
30:
27:ITU-T Recommendation for telephone numbering
29:
792:
512:. The international calling prefix is a
429:
393:
357:
324:
291:
173:are not contained in the specification.
622:
7:
628:
626:
125:For the the food additive E164, see
111:https://www.itu.int/rec/T-REC-E.164/
611:ITU National Number Plans Reference
241:shared country code consists of a
25:
468:public switched telephone network
202:public switched telephone network
153:public switched telephone network
875:World Telephone Numbering Guide
731:from the original on 2019-11-12
702:from the original on 2019-11-12
673:from the original on 2019-07-29
644:from the original on 2019-11-06
565:3.2.1.0.5.5.5.9.9.9.1.e164.arpa
178:Numbering Plan for the ISDN Era
900:ITU-T E Series Recommendations
563:translates to the domain name
196:recommendation for describing
1:
787:. April 2000. sec. 2.2.
599:List of country calling codes
828:. Cisco Press. p. 172.
520:DNS Mapping of E.164 numbers
494:international calling prefix
822:Olsen, Chris (2011-08-01).
569:Session Initiation Protocol
282:international call prefixes
171:international call prefixes
155:(PSTN) and some other data
916:
523:
436:Trial Identification Code
400:Group Identification Code
298:National Destination Code
124:
31:Recommendation ITU-T E.164
454:
418:
382:
343:
331:Global Subscriber Number
313:
308:
247:group identification code
35:
780:URLs for Telephone Calls
571:(SIP), a call-signaling
544:telephone number mapping
526:Telephone number mapping
143:Recommendation), titled
137:international standard
122:
500:. This is called the
462:Uses of E.164 numbers
192:E.163 was the former
121:
498:country calling code
364:Identification Code
390:Groups of countries
218:identification code
32:
536:Domain Name System
455:maximum 15 digits
450:maximum 11 digits
439:Subscriber Number
419:maximum 15 digits
414:maximum 11 digits
403:Subscriber Number
383:maximum 15 digits
367:Subscriber Number
344:maximum 15 digits
339:maximum 12 digits
314:maximum 15 digits
301:Subscriber Number
263:telecommunications
151:for the worldwide
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890:Telephone numbers
589:Carrier of Record
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257:Numbering formats
164:telephone numbers
147:, that defines a
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83:Related standards
16:(Redirected from
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794:10.17487/RFC2806
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756:. Archived from
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605:External Sources
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288:Geographic areas
206:directory number
200:numbers for the
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847:External links
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640:. p. 11.
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375:1 to 4 digits
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538:(DNS) of the
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397:Country Code
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295:Country Code
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805:. Retrieved
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762:. Retrieved
758:the original
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733:. Retrieved
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704:. Retrieved
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646:. Retrieved
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243:country code
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65:Organization
49:Year started
895:Identifiers
807:January 11,
754:www.itu.int
725:www.itu.int
696:www.itu.int
667:www.itu.int
638:www.itu.int
548:domain name
433:Fixed code
884:Categories
764:2019-11-12
735:2019-11-12
706:2019-11-12
677:2019-11-12
648:2019-11-12
617:References
514:trunk code
502:globalized
477:entitled
408:3 digits
372:3 digits
350:Figure 2
336:3 digits
198:telephone
101:telephony
75:Committee
60:June 2020
729:Archived
700:Archived
671:Archived
642:Archived
583:See also
540:Internet
532:Internet
447:1 digit
411:1 digit
354:Networks
157:networks
44:In force
270:routing
236:E.164.3
224:E.164.2
212:E.164.1
127:Saffron
107:Website
832:
508:
473:ITU-T
426:Trials
245:and a
135:is an
97:Domain
41:Status
594:E.123
475:E.123
251:ITU-T
194:ITU-T
188:E.163
141:ITU-T
133:E.164
91:E.163
87:E.123
69:ITU-T
18:E.163
830:ISBN
809:2021
802:2806
785:IETF
573:VoIP
560:0123
510:2806
444:991
275:ISDN
230:+991
52:1984
799:RFC
789:doi
557:555
554:999
506:RFC
886::
797:.
783:.
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727:.
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636:.
625:^
552:+1
265:.
159:.
89:,
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791::
767:.
738:.
709:.
680:.
651:.
490:+
483:+
139:(
129:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
