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An area code overlay is a numbering plan area (NPA) in the North American Numbering Plan (NANP) that has multiple area codes assigned. Overlay complexes are used to add central office prefixes in an NPA to increase the number of available telephone numbers. [1]
In telecommunications, an area code overlay complex is a telephone numbering plan that assigns multiple area codes to the same geographic numbering plan area (NPA). Area code overlays are implemented in territories of the North American Numbering Plan (NANP) to mitigate exhaustion of central office codes in growth areas. The method has been in ...
A numbering plan area with multiple area codes is called an overlay. Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC).
Add three new area codes including a third overlay on 213/323 among other changes. 16:29, 15 December 2021: 491 × 672 (76 KB) Rfc1394: Add CSS to make future changes easier: 21:21, 15 July 2021: 491 × 672 (82 KB) CapitalSasha: correcting area code 828 -> area code 628: 22:21, 29 August 2019: 491 × 672 (82 KB) Rfc1394: add new area codes: 12: ...
Overlayed new area code 640 over 609: 06:38, 16 January 2017: 408 × 391 (3.65 MB) Psiĥedelisto: fix wrong color of area code 609 barrier islands which was masked by outlines in previous version of image: 21:45, 3 December 2016: 408 × 391 (3.65 MB) Kbrose: Remove black emphasis of border lines: 16:37, 2 December 2016: 408 × 391 (3.67 MB ...
Add three new area codes including a third overlay on 213/323 among other changes. 12:59, 15 December 2021: 491 × 672 (76 KB) Rfc1394: Now uses CSS, sign showinh area code numbers is red again: 21:16, 15 July 2021: 491 × 672 (82 KB) CapitalSasha: correcting area code 828 -> area code 628: 21:53, 29 August 2019: 491 × 672 (82 KB) Rfc1394 ...
610 xxx xxxx — local calls within the 610 area code and its overlay (484), as well as calls to or from the neighboring 215 area code and its overlay, 267. Area code is required; one of two completion options for mobile phones within the U.S.
On September 2, 2001, area code 470, was added to the 678 overlay area of area codes 404 and 770. [1] Telephone numbers from the NPA were assigned after exhaustion of area code 678. In October of 2020, the Georgia Public Service Commission approved the creation of a new overlay area code after NANPA exhaustion analyses projected shortfall of ...