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The North American Numbering Plan (NANP) divides the territories of its members into geographic numbering plan areas (NPAs). Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits.
The largest telephone numbering plan in North American is the North American Numbering Plan (NANP), serving 25 regions or countries. Other countries maintain an autonomous numbering plan with distinct country codes within the international E.164 specifications by the International Telecommunication Union. Original North American area codes
This category lists the telephone area codes in the United States. ... Toll-free telephone number; 0–9. Area codes 201 and 551; Area codes 202 and 771;
Each three-digit area code has a capacity of 7,919,900 telephone numbers (7,918,900 in the United States). Despite widespread use as fictional telephone numbers in the form NXX 555-XXXX , only line numbers 0100 through 0199 are reserved for this purpose, while 1212 and 4334 are the only assigned uses for directory assistance and other functions.
NPA-911 is forbidden as 9-1-1 is an emergency telephone number. (This is less restrictive than the rules prohibiting all three-digit N-1-1 codes as exchanges in all geographic area codes.) NPA-555 is reserved in every toll-free area code (except 800) for future information or directory assistance applications
A phone number communicates a lot --and if you dig a little deep, an area code contains information about the economic ... 800-290-4726 more ways to reach us. Mail. Sign in. Subscriptions; Business;
A phone number communicates a lot --and if you dig a little deep, an area code contains information about the economic situation of its residents, too. Richest and poorest area codes in the US ...
Pages in category "Lists of United States area codes" The following 52 pages are in this category, out of 52 total. This list may not reflect recent changes. *