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Interactive map of the numbering plan areas of the Commonwealth of Pennsylvania (blue). This is a list of telephone area codes of Pennsylvania. In 1947, the American Telephone and Telegraph Company divided Pennsylvania into four numbering plan areas (NPAs) and assigned distinct area codes for each.
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). NPAs with 9 in the second position are reserved for future format expansion.
The initial area codes were created in 1947 as routing codes for operator-assisted calls. Quebec and Ontario were the only provinces that received multiple area codes. Quebec was split between area codes 514 and 418. Area code 514 was originally assigned to the entire western half of Quebec from the Canada–US border to the Hudson Strait. The ...
This page was last edited on 23 December 2022, at 01:39 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
This page was last edited on 22 January 2023, at 16:16 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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 .
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Pages in category "Area codes in Pennsylvania" The following 11 pages are in this category, out of 11 total. This list may not reflect recent changes. 0–9.