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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 .
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).
All California telephone Area Code maps are now using the SVG file format due to the regular need for changes, the older PNG image format maps have been deprecated and will no longer be maintained, changed, corrected or updated when new area codes are added to California or to states bordering California.
Printable version; In other projects ... List of area code overlays; M. ... List of North American Numbering Plan area codes;
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 ...
Note: This template should only be edited when a new area code, existing area code(s) is/are merged into an overlay, or a new country, is added to the North American Numbering Plan. This page is called by template Area code box to include the particular area code(s) used by a specific Caribbean Country, Canadian Province, or U.S. State. This ...
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: ...
Schematic map showing (in red) geographical area of District of Columbia serving area codes 202/771 and surrounding areas in Maryland 240/227/301 and Virginia 571/703 US area codes. This has been updated to cover latest area code information for DC, Maryland and Virginia adjacent area codes as of 2023-06-28.