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Area code 609 serves telephones in southeastern and central New Jersey, including the cities of Trenton, Princeton, Hamilton and Atlantic City. In terms of geographic coverage, it is the largest in the state of New Jersey.
All of New Jersey was served at first by area code 201, until area 609 was created in a split in 1958. Before 201 was again split in 1991, New Jersey residents informally viewed area codes 201 and 609 as defining the boundaries of "North Jersey", dominated by its proximity to New York City and "South Jersey", dominated by its proximity to Philadelphia and the Jersey Shore.
609 now covers parts of Central Jersey, South Jersey and the Jersey Shore. The southwestern part of the state adjacent to Philadelphia is now covered by area code 856, as a result of a split in 1999, although many parts of Burlington County are still covered under 609. Area 609 includes portions of southern Middlesex County in Plainsboro, Cranbury, parts of South Brunswick (particularly Kingston) and the extreme southern part of Monroe.
Area code 609 is expected to run out of numbers by the first quarter of 2016, but there are no plans to overlay or split the area code, despite the area code being in 2 LATAS and the rapid population increase of the area. However, many numbers are protected and releasing those could extend the relief date.
|New Jersey area codes: 201, 551, 609, 732, 848, 856, 862, 908, 973|
|North: 732/848, 908|
|West: 215/267, 856||609||East: Atlantic Ocean|
|New York area codes: 212, 315, 347, 516, 518, 585, 607, 631, 646, 716, 718, 845, 914, 917, 929|
|Pennsylvania area codes: 215, 267, 412, 484, 570, 610, 717, 724, 814, 878|
|Delaware area codes: 302|