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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 NANP divides the territories of its members into numbering plan areas (NPAs) which are encoded numerically with a three-digit telephone number prefix, commonly termed the area code. [3] Each telephone is assigned a seven-digit telephone number unique only within its respective numbering plan area.
AT&T divided the United States and Canada into numbering plan areas (NPAs), and assigned to each NPA a unique three-digit prefix, the numbering plan area code, which became known in short-form as NPA code or simply area code. The area code is prefixed to each telephone number issued in its service area.
If another area code borders on more than one direction put it in multiple directions. If an area code borders on an odd direction such as northwest, code both N=and W=. To make them clickable links, include the description surrounded by link brackets, e.g. if the area code to the north of this area code is 710, you'd code N=[[Area code 710]].
[1] [2] This change in numbering format was implemented first for central office codes by 1973, which eliminated the restriction in the middle digit (2 to 9) to also permit 0 and 1. The middle position of the area code could only be 0 and 1. In 1995, this restriction for area codes was lifted as well, creating interchangeable NPA codes.
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]
This is a list of future area codes in the North American Numbering Plan (NANP) that are in the planning stages for relief of central office code exhaustion in the given numbering plan areas (NPAs). The dates are subject to change during implementation as published in the official NANP Administrator Planning Letters.
An area code of three digits dialed after the country code determines the area served in the United States and its territories, Canada, and much of the Caribbean. Zone 2 uses two 2-digit codes (20, 27) and eight sets of 3-digit codes (21x–26x, 28x, 29x), mostly to serve Africa , but also Aruba , Faroe Islands , Greenland and British Indian ...