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In 1947, the American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan and assigned the original North American area codes. The state of California was divided into three numbering plan areas (NPAs) with distinct area codes : 213 , 415 , and 916 , for the southern, central, and northern parts of the ...
Landline phone numbers begin with the area code, then one digit for the operator code, then six digits for the primary telephone number. Format: (XXX Y ZZZZZZ) where: "xxx" denotes the area code. All area codes begin with the number 0. The operator code for fixed (landline) numbers is "y".
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.
914: 1947 Westchester County: 917: 1992 New York City: all; overlays with 212, 332, 347, 646, 718, and 929 929: 2011 New York City: all except Manhattan; overlays with 347, 718, and 917 934: 2016 Suffolk County; overlay of 631 [1]
In mitigation, numbering plan area 914 was reduced to Westchester County on June 5, 2000. The remainder was assigned the new area code 845. Area code 914 was retained by all cellphones in use in the plan area before the split. [2] Prior to October 2021, area code 914 had telephone numbers assigned for the central office code 988.
This rounded the total number of digits in a subscriber telephone number to ten: a three-digit area code, three-digit central office code, and four digits for each line. This fixed format defined the North American Numbering Plan as a closed numbering plan , [ 27 ] as opposed to developments in other countries where the number of digits was not ...
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This table lists in its first column the initial digits of the country code shared by each country in each row, which is arranged in columns for the last digit. When three-digit codes share a common leading pair, the shared prefix is marked by an arrow, ( ↙ ) pointing down and left to the three-digit codes.