The North American Numbering Plan (NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean.This group is historically known as World Zone 1 and has the international calling code 1.Some North American countries, most notably Mexico, do not participate in the NANP. The NANP was originally devised in the …

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.Numbering plan areas may be assigned multiple area …

Member countries of the North American Numbering Plan (NANP) are assigned three-digit area codes under the common country prefix 1, shown in the format +1 XXX.. The North American Numbering Plan includes: +1 – Canada +1 – United States, including United States territories: +1 340 – United States Virgin Islands +1 670 – Northern Mariana Islands

The original North American area codes were established by the American Telephone & Telegraph Company (AT&T) in the years immediately following World War II. Creating a comprehensive and universal, continent-wide telephone numbering plan was a basic requirement for nationwide Operator Toll Dialing which had the goal of speeding the connecting times for …

All 01xxx area codes from 01200 to 01999 not otherwise mentioned. 4+6 areas where part of range is assigned as 5+5: 10: 01387, 01539 ... Some are within the North American Numbering Plan (NANP). These calls are treated as international calls. Below are the access codes for the overseas territories: North American Numbering Plan. Anguilla +1 (264)

Area codes 215, 267, and 445 are the North American telephone area codes for the City of Philadelphia as well as adjacent portions of Bucks and Montgomery counties in the Commonwealth of Pennsylvania.The original area code is 215, which was established in 1947, while 267 and 445 are overlay codes for the same numbering plan area (NPA).. In 1947, when …

Area codes 508 and 774 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of Massachusetts.The numbering plan area comprises south-central and most of southeastern Massachusetts (LATA code 128).It includes Worcester, Outer south and southwest Greater Boston (such as the MetroWest region), as well as Fall River, New Bedford, …

Area codes 819 and 873 are telephone area codes in the North American Numbering Plan (NANP) for central and western Quebec, Canada, including the Quebec portion of the National Capital Region, and the Hudson Strait and Ungava Bay coastlines of Quebec. Major cities in the territory include Gatineau, Sherbrooke, Trois-Rivières, Drummondville, Shawinigan, …

The integration of the Caribbean telephone networks into the North American Numbering Plan (NANP) began with the assignment of area codes in the Caribbean in 1958, when area code 809 was designated for Bermuda and any other potential participant island countries.. From 1958 to 1999, most of the British West Indies in the Caribbean Basin, Bermuda, the U.S. Virgin …

Area codes 801 and 385 are area codes in the North American Numbering Plan serving Salt Lake City and the four surrounding counties of the Wasatch Front in north ... most new numbers have been assigned the 385 area code. See also. List of NANP area codes; References External links. NANPA area code map of Utah ; List of exchanges from ...