Area codes 609 and 640
Area code 609 serves telephones in central New Jersey, including the cities of Trenton, Princeton, Hamilton, and southeastern parts of the state and the Jersey Shore, including Atlantic City and Long Beach Island. In terms of geographic coverage, it is the largest in the state of New Jersey.
In the original North American Numbering Plan (NANP), all of New Jersey was served by area code 201, until it was split in 1958 to create area 609. This division generally followed the dividing line between North Jersey, proximate to New York City, and South Jersey, proximate to Philadelphia and the Jersey Shore.
In 1999, the southwestern part of area 609, the area adjacent to Philadelphia, was split off as area code 856. Since that time, the 609 territory covers parts of Central Jersey, South Jersey and the Jersey Shore, and many parts of Burlington County. It also includes portions of southern Middlesex County in Plainsboro, Cranbury, parts of South Brunswick (particularly Kingston) and the extreme southern part of Monroe. The boundary was drawn in such a way so that several towns were split between area codes. Some prefixes assigned to mobile phone providers that lie within the 856 territory have never had their area code changed; thus 609 serves as a de facto partial overlay of 856, although it is rarely acknowledged as such.
As of October 2014, the area code 609 number pool was expected to be exhausted by the second quarter of 2017, about 15 months later than projected a year before. Permissive dialling began in mid-January 2018, and will end in mid-August when 10-digit dialling becomes mandatory. Come mid-September, new numbers will be assigned in 640 area code.
- Demasters, Karen. "The New Phone Math: 609 Divided by 2", The New York Times, February 7, 1999. Accessed August 6, 2008.
- NANPA Area Code Map of New Jersey
- List of exchanges from AreaCodeDownload.com, 609 Area Code
- List of exchange codes from AllAreaCodes.com, 609 Area Code
|New Jersey area codes: 201/551, 609, 732/848, 856, 862/973, 908|
|North: 732/848, 908|
|West: 215/267/445, 856||609/640||East: Atlantic Ocean|
|New York area codes: 212/332/646, 315/680, 347/718/929, 516, 518/838, 585, 607, 631/934, 716, 845, 914, 917|
|Pennsylvania area codes: 215/267/445, 223/717, 272/570, 412, 484/610, 724, 814, 878|
|Delaware area codes: 302|