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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.
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
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 ...
With the increasing demand for telephone numbers by businesses, increased used of fax machines, pagers and cell phones, area code 609 exhausted its numbering capacity. [5] Area code 856 was announced by Bell Atlantic in March 1999, and was approved by the New Jersey Board of Public Utilities shortly thereafter. The new area code became ...
Numbering plan areas and area codes of New Jersey Map of numbering plan area 201/551. Area codes 201 and 551 are telephone area codes in the North American Numbering Plan (NANP) in the U.S. State of New Jersey. Area code 201 was the area code assigned to the entire state of New Jersey in 1947, when the North American area code system was formed.
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.
Under this plan, the New Jersey telephone number (609) 555-0175 would become (6909) 555-0175. The permissive dialing period where detecting the 9 as the second digit (to expect 11 numbers) would eventually have an end date, and then new NPAs with a second digit other than 9 could be assigned, effectively multiplying the number of NPAs by ten.
As a result, while North Jersey went from one area code to four during the 1990s, 609 remained the sole area code for the southern half of New Jersey for 41 years. By the late 1990s, the proliferation of cell phones and pagers, particularly in the Philadelphia suburbs, Trenton, and in Atlantic City, necessitated a new area code in South Jersey.