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Area code 201 was the original, sole area code for New Jersey in 1947, when the American Telephone and Telegraph Company (AT&T) devised the first continental telephone numbering plan. It was also the first area code assigned in the numbering plan.
Area code 551 was created in 2001 to overlay 201, along with area codes 862 and 848, which overlay area codes 973 and 732, respectively. [12] With the implementation of the overlays on December 1, 2001, ten-digit dialing became mandatory in Northern New Jersey.
Area code 973 was created on June 1, 1997, in a split of area code 201, [1] [2] which was the original area code for of all of New Jersey when the North American Numbering Plan was inaugurated for nationwide operator dialing in 1947. In 1958, the numbering plan area of 201 was cut back to the northern half of the state, and in 1991 to just the ...
The area includes Middlesex, Somerset, and Union counties in Northern and Central New Jersey, and Monmouth and northern Ocean counties on the New Jersey Shore. The assignment of area code 848 to the same numbering plan area in 2001 created an overlay complex for this region, after the pool of 732-numbers began to exhaust rapidly. [7]
List of New Jersey area codes; 0–9. Area codes 201 and 551; Area codes 609 and 640; Area codes 732 and 848; Area code 856; Area code 908; Area codes 973 and 862
After the success of these trials, [23] [27] expansion of the numbering plan accelerated with new crossbar systems and four new area codes in 1953, and seven in 1954. By the end of the decade thirty-one new area codes had been created in addition to the initial allotment of 1947. [28] to satisfy the post-war surge in demand for telephone service.
Area code 856 is a telephone area code in the North American Numbering Plan (NANP) for the southwestern part of the U.S. state of New Jersey. The numbering plan area (NPA) includes the Camden , Cherry Hill , and Vineland areas and a small part of Willingboro Township and the western part of Burlington County . 856 is essentially coextensive ...
In terms of geographic coverage, it is the largest numbering plan area in New Jersey. Area code 609 was created in a split of area code 201 in c. 1956. Area code 640 is an additional area code for the area, created on September 17, 2018.