Where Is Area Code 640?
Area code 640 serves south-central and southeastern New Jersey. Allentown, the primary city associated with the code, is in western Monmouth County. New Jersey is part of the Mid-Atlantic region, and area code 640 uses Eastern Time.
Area code 640 is an overlay of area code 609 and covers the same geographic area. The region includes parts of Atlantic, Burlington, Cape May, Mercer, Middlesex, Monmouth, and Ocean counties. Major communities include Trenton, Princeton, Atlantic City, Burlington, Cape May, and Allentown.
The region extends from the Delaware River corridor near Trenton and Burlington to coastal communities along the Atlantic Ocean. It also includes parts of the New Jersey Pine Barrens. Notable sites include the New Jersey State House in Trenton, Princeton University, and the Atlantic City Boardwalk.
Cities and Communities in the 640 Area Code
- Allentown, Monmouth County
- Atlantic City, Atlantic County
- Barnegat, Ocean County
- Bordentown, Burlington County
- Burlington, Burlington County
- Cape May, Cape May County
- East Windsor Township, Mercer County
- Ewing Township, Mercer County
- Hamilton Township, Mercer County
- Hightstown, Mercer County
- Lawrence Township, Mercer County
- Medford, Burlington County
- Princeton, Mercer County
- Robbinsville Township, Mercer County
- Trenton, Mercer County
- Tuckerton, Ocean County
- Waretown, Ocean County
- West Windsor Township, Mercer County
- Willingboro Township, Burlington County
History of Area Code 640
Area code 640 was established in 2018 as an overlay of area code 609. It was not created by splitting territory from 609. The overlay added numbering capacity while allowing existing 609 numbers to remain in service.
Area code 609 was established in 1958 as part of New Jersey's regional telephone numbering system. Area code 856 split from 609 in 1999 to serve southwestern New Jersey. The later 640 overlay kept the remaining 609 service area intact while adding a second geographic code.
Key Facts About Area Code 640
- Area code 640 is a geographic area code in New Jersey's Mid-Atlantic region.
- Allentown in Monmouth County is the primary city associated with area code 640.
- Area code 640 overlays area code 609 and covers the same geographic region.
- The 640 and 609 service area includes parts of Atlantic, Burlington, Cape May, Mercer, Middlesex, Monmouth, and Ocean counties.
- Area code 640 was established in 2018.
- Area code 609 was established in 1958, and area code 856 split from it in 1999.
- The New Jersey State House is in Trenton, and Princeton University is in Princeton, both within the 640 and 609 overlay region.
- Area code 640 uses Eastern Time.
Frequently Asked Questions
What state is area code 640 in?
Area code 640 is in New Jersey.
What major cities use area code 640?
The major communities in the 640 overlay region include Allentown, Trenton, Princeton, Atlantic City, Burlington, and Cape May.
What time zone is area code 640 in?
Area code 640 is in the Eastern Time Zone.
Is area code 640 a toll-free number?
No. Area code 640 is a geographic area code, not a toll-free code.