Allentown, New Jersey

Where Is Area Code 640?

Area code 640 is in New Jersey. It is assigned to the same calling region as area code 609, which covers parts of central and southern New Jersey, including Allentown in Monmouth County.

The 609 and 640 area code region includes Trenton, Princeton, Atlantic City, and parts of the Jersey Shore region. It also covers communities in counties such as Mercer, Monmouth, Ocean, Burlington, Atlantic, Cape May, and Cumberland.

This area includes well-known places such as the New Jersey State House in Trenton, Princeton University in Princeton, and Atlantic City on the Atlantic coast. The region also includes coastal areas, inland suburbs, and smaller boroughs such as Allentown.

History of Area Code 640

Area code 640 was established on September 17, 2018, as an overlay for area code 609. The New Jersey Board of Public Utilities approved the overlay to add more phone numbers without changing existing 609 numbers.

Area code 609 is much older and dates back to 1958, when it was created in a split from area code 201. The 640 overlay reflects long-term growth in mobile phones, business lines, and other services that increased demand for new numbers in the 609 region.

Key Facts About Area Code 640

• Area code 640 is a New Jersey area code that serves the same region as area code 609.
• Allentown, New Jersey, is one community in the 640 area code region.
• Area code 640 is an overlay, not an original area code and not a geographic split.
• Area code 640 entered service on September 17, 2018.
• Area code 640 and 609 cover cities including Trenton, Princeton, and Atlantic City.
• The 640 area code region uses the Eastern Time Zone.
• Princeton University is located within the broader 609 and 640 calling area.
• The New Jersey State House in Trenton is within the broader 609 and 640 calling area.

Frequently Asked Questions

What state is area code 640 in?

Area code 640 is in New Jersey.

What major cities use area code 640?

Area code 640 serves the same region as 609, including Trenton, Princeton, Atlantic City, and communities such as Allentown.

Is area code 640 a toll-free number?

No. Area code 640 is a geographic area code.