North American Numbering Plan

Area codeArea codesArea code(s)Area code(s) North American Numbering Plan AdministrationNANPNANPA+1North AmericaNumbering Plan
The North American Numbering Plan (NANP) is a telephone numbering plan that encompasses twenty-five distinct regions in twenty countries primarily in North America, including the Caribbean.wikipedia
3,359 Related Articles

Telephone numbering plan

Area codeTelephone codearea codes
The North American Numbering Plan (NANP) is a telephone numbering plan that encompasses twenty-five distinct regions in twenty countries primarily in North America, including the Caribbean.
National telephone numbers are defined by national or regional numbering plans, such as the European Telephony Numbering Space, the North American Numbering Plan (NANP), or the UK number plan.

Direct distance dialing

direct dialdirect distance dialIDDD
Direct distance dialing (DDD) was subsequently introduced across the country.
DDD was the term used when the North American Numbering Plan was implemented in the 1950s.

Area codes 214, 469, and 972

972214469
Area code 905, formerly used for Mexico City, was reassigned to a split of area code 416 in the Greater Toronto Area; area code 706, which had formerly served Mexico's Baja Peninsula, was reassigned to a portion of northern Georgia surrounding the Atlanta region, which retained 404; and area code 903, which served a small portion of northern Mexico, was reassigned to northeastern Texas when it split from area code 214.
Area code 214 was one of the original area codes established with the North American Numbering Plan in October 1947.

Seven-digit dialing

7-digit dialing7-digit diallingfixed-length seven-digit number
The intent was for subscribers not to have to dial an area code when making a local call or a call within their plan area, resulting in seven-digit dialing.
Seven-digit dialing is a telephone dialing procedure customary in the territories of the North American Numbering Plan, for dialing telephone numbers in the local calling area.

List of original NANP area codes

original area codesoriginal 86 area codesoriginal area code
Originally only 86 area codes were assigned.
In preparation for direct distance dialing, AT&T and the Bell System developed the North American Numbering Plan in the 1940s.

Area codes 317 and 463

317317 and 463317 & 463
For example, the Indiana numbering plan area 317 was divided to provide a larger numbering pool in the Indiana suburbs of Chicago (area code 219).
Area codes 317 and 463 are North American Numbering Plan area codes for central Indiana.

Canadian Numbering Administration Consortium

CNACCanadian Numbering Administrator
Canadian numbering decisions are made by the Canadian Numbering Administration Consortium.
The CNAC is also responsible for paying the Canadian portion of the North American Numbering Plan Administration (NANPA) costs, which are funded by Canadian telecommunication service providers (TSP).

Neustar

NeuStar Inc.QuovaNeulevel
In 1999, the contract was awarded to Neustar Inc., a company spun off from Lockheed for this purpose.
Upon its incorporation in 1998, and continuing until 2018, the original business of Neustar was the administration of the North American Numbering Plan, the maintenance of the system of directories and databases that manage the telephone area codes and central office prefixes in North America.

Area code 721

+1 721721+1-721
Partially Dutch-speaking Sint Maarten joined the NANP in September 2011, receiving area code 721.
Area code 721 is the telephone area code of Saint Martin within the North American Numbering Plan.

Ten-digit dialing

10-digit dialingten-digit diallingten digits
Area codes were only required in ten-digit dialing when placing foreign area calls to subscribers in another state or numbering plan area.
After the implementation of the North American Numbering Plan, placing a local call within the caller's area code involved only seven-digit dialing.

Telephone number

phone numbertelephone numbersphone numbers
Each telephone is assigned a seven-digit telephone number unique only within its respective plan area.
The format and allocation of local phone numbers are controlled by each nation's respective government, either directly or by sponsored organizations (such as NANPA in the US or CNAC in Canada).

555 (telephone number)

555555 telephone number5-5-5
In some works of fiction, phone numbers will begin with "KLondike 5" or KLamath 5, which translates to 555, an exchange that is reserved for information numbers in North America.
The telephone number prefix 555 is a central office code in the North American Numbering Plan, used as the leading part of a group of 10,000 telephone numbers, 555-XXXX, in each numbering plan area (NPA)(area code).

Overlay plan

overlayoverlaidoverlay area code
Area codes are added by two principal methods, number plan area splits and overlay plans.
Overlaying area codes is practiced in territories that belong to the North American Numbering Plan (NANP).

North American Numbering Plan expansion

Using 0 or 1 as the first digit of an area code or seven-digit local number is invalid, as is a 9 as the middle digit of an area code; these are trunk prefixes or reserved for North American Numbering Plan expansion.
The expansion of the North American Numbering Plan (NANP) is an anticipated requirement to provide more telephone numbers to accommodate future needs beyond the pool of ten-digit telephone numbers in use since the inception of the NANP in 1947.

Area code 202

202Area codes in Washington, D.C.
The second area code, 202, was assigned to the District of Columbia.
The area code was one of the original area codes established in October 1947 by AT&T in the North American Numbering Plan (NANP).

N11 code

N-1-1N11N11 number
An N11 code (N-one-one) is a three-digit telephone number used in abbreviated dialing in some telephone administrations of the North American Numbering Plan (NANP).

Telephone exchange names

central office nametelephone exchangetelephone exchange name
This was already common practice, because in the system of using the first two letters of familiar names for central offices did not assign letters to digits 1 and 0.
In the 1940s, the Bell System developed the North American Numbering Plan, a system of initially 86 allocated area codes which were used at first only by switchboard operators to route trunk calls between plan areas.

Area code 334

334
The first area codes without a 1 or 0 as the middle digit were area code 334 in Alabama and area code 360 in Washington, which both began service on January 15, 1995.
Area code 334 is an NANPA area code serving southeastern Alabama.

Area code 612

612Minneapolis, MN
In 1998 area code 612, which had covered the Minneapolis – Saint Paul Twin Cities, was split to create area code 651 for St. Paul and the eastern metropolitan area.
Area code 612 is part of the North American Numbering Plan (NANP) of the public switched telephone network for the city of Minneapolis, Minnesota and a few surrounding areas such as Fort Snelling, St. Anthony and Richfield.

Area codes 702 and 725

702 and 725702725
Nevada was denied 777 ("lucky 7s", a reference to the state's legalized gambling) for this reason; it received 775 instead when most of Nevada split from 702, which continues to serve the Las Vegas metropolitan area.
Area codes 702 and 725 are the North American Numbering Plan telephone area codes serving Clark County, Nevada, including Las Vegas.

Area code 917

917
The only service-specific overlay in the NANP was area code 917 (New York City) when it was first installed; such service-specific area code assignments were later prohibited by the Federal Communications Commission.
Area code 917 is a telephone area code in the North American Numbering Plan for the five boroughs of New York City: The Bronx, Brooklyn, Manhattan, Queens, and Staten Island.

Area code 700

700AT&T EasyReach 700
Codes ending in double digits are reserved as easily recognizable codes (ERCs), to be used for special purposes such as toll-free numbers, personal 500 numbers, Canadian non-geographic area code 600, carrier-specific 700 numbers, and high-toll 900 numbers, rather than for geographic areas.
Area code 700 of the North American Numbering Plan is reserved for carrier-specific number assignments to special services or destinations.

Number pooling

As a result, number pooling was piloted in 2001 as a system for allocating local numbers to carriers in blocks of 1,000 rather than 10,000.
Number pooling is a method of reallocating telephony numbering space in the North American Numbering Plan, primarily in growth areas in the United States.

Area code 360

360360/564
The first area codes without a 1 or 0 as the middle digit were area code 334 in Alabama and area code 360 in Washington, which both began service on January 15, 1995.
Area codes 360 and 334 (Alabama), which began service on the same day, were the first two area codes in the North American Numbering Plan with a middle digit other than 0 or 1.

List of country calling codes

Country CodeDialing codeCalling code
For international call routing, the NANP has been assigned the international calling code 1 by the International Telecommunications Union (ITU).
For example, the international call prefix in all countries belonging to the North American Numbering Plan is 011, while it is 00 in most European, Asian and African countries.