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Telephone number conserving practices mitigated exhaustion of area codes 724 and 412 until April, 2013. The first 878 numbers were issued in April 2013, after 724 central office codes were exhausted. The first 878 numbers in the 412 territory were issued a few years later.
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Major locations in the numbering plan area are: Beaver, Butler, Cranberry
Township, Ellwood City, Greensburg, Hermitage, Imperial, Indiana, Kittanning, Latrobe, New Castle, North Huntingdon, Oakdale, Sharon, Uniontown, Washington, Waynesburg, & Wexford.
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Within only two years, both 724 and 412 were nearing exhaustion due to rapid growth of telecommunication services in the
Pittsburgh area from proliferation of cell phones and pagers. By this time, overlays had gained more acceptance, and
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on
February 1, 1998, which made the 412 numbering plan area (NPA) an enclave for the city, with 724 surrounding 412. In 2001, area codes 412 and 724 were overlaid with
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with both the 412 and 724 territories on August 17, 2001, after rationing of central office prefixes ended. Since that date,
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with 412 at a time when overlays were still a new concept, and were met with resistance because of the requirement for
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to a numbering plan area that comprised the entire southwestern corner of
Pennsylvania.
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with the new area code. This created an area code enclave in the city of
Pittsburgh.
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298:"Planning Letter 281: Rationing in NPAs 412, 724, and 878 (Pennsylvania)"
274:"Planning Letter 222: NPA 878 to Overlay NPAs 412 and 724 (Pennsylvania)"
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Area code 724 serves parts of fourteen counties in
Pennsylvania.
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Pennsylvania (blue) with numbering plan area 724 shown in red.
245:"Nation-Wide Operator Toll Dialing—the Coming Way"
130:has been mandatory in southwestern Pennsylvania.
91:In 1947, area code 412 was assigned as one of 86
566:Telecommunications-related introductions in 1998
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225:(all except portion in extreme northeast)
102:wanted to implement area code 724 as an
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63:for the Commonwealth of Pennsylvania in
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153:(northern, eastern, and western edges)
65:western and southwestern Pennsylvania
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353:NANPA area code map of Pennsylvania
181:(extreme southwestern portion only)
93:original North American area codes
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243:Mabbs, Ralph (Winter 1947–1948).
208:(all except northeastern portion)
16:Area code in western Pennsylvania
338:from the original on 2021-12-01.
571:Area codes in the United States
159:(all except northeast portion)
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61:North American Numbering Plan
214:(southeastern portion only)
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576:Area codes in Pennsylvania
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322:"NPA 724 Rate Center Map"
249:Bell Telephone Magazine
71:. It was created in an
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98:The regional carrier
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279:. NANPA. 2000-03-14
223:Westmoreland County
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175:(portions of west)
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376:40.052°N 79.826°W
218:Washington County
128:ten-digit dialing
108:ten-digit dialing
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151:Allegheny County
112:Allegheny County
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179:Crawford County
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100:Bell Atlantic
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547:area codes:
508:area codes:
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392:Pennsylvania
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305:. Retrieved
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281:. Retrieved
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257:. Retrieved
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138:Service area
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408:610/484/835
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379: /
560:Categories
468:Surrounds
367:79°49′34″W
364:40°03′07″N
329:puc.pa.gov
307:2023-06-23
283:2023-07-18
259:2022-04-23
230:References
69:Pittsburgh
57:area code
333:Archived
255:(4): 181
549:304/681
538:937/326
534:740/220
530:614/380
526:513/283
522:440/436
518:419/567
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497:304/681
484:814/582
437:814/582
420:814/582
412:717/223
404:570/272
87:History
59:in the
493:South
433:North
336:(PDF)
325:(PDF)
301:(PDF)
277:(PDF)
506:Ohio
480:East
463:724/
446:West
510:216
474:878
470:412
465:878
458:304
454:234
450:330
424:878
416:724
400:412
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.