What area code is 640?
Here's everything about it.
Instant lookup for the 640 area code — location, time zone, cities served, and who's been calling from it. No sign-up, no app.
640 at a glance
Summary
Cities & regions served by 640
South NJ (overlay)3 communities on record for 640.
Where 640 sits on the map
Overlay of 609Coverage area
About the 640 region
640 covers South NJ in New Jersey, including Trenton, Atlantic City and Princeton. The code has been in service since 2018.
640 itself is an overlay: it shares its territory with 609 and was introduced when those codes ran low on new number combinations. New lines may receive either code, calls between them are local, and 10-digit dialing is required across the region.
Overlaid on 609.
Who called me from 640?
Community reports- Caller ID is trivially spoofed: an incoming call that displays 640 does not prove the caller is really in the 640 region or even in the United States.
- Avoid calling back unknown one-ring numbers — some premium-rate scams rely on curiosity callbacks.
- Never share verification codes, payment details, or remote access during an unsolicited call, even if the caller claims to be your bank or a government agency.
- When a 640 call pressures you to act immediately, hang up and contact the organization directly through its official number.
Be the first to add a community report for a 640 number below.
Frequently asked questions
FAQWhat area code is 640?+–
640 is a telephone area code serving South NJ in New Jersey, United States, in service since 2018.
Where is area code 640 located?+–
It covers Trenton, Atlantic City and Princeton in New Jersey.
What cities are in area code 640?+–
Major communities on record include Trenton, Atlantic City and Princeton. The code's territory spans the South NJ region of New Jersey.
What time zone is 640?+–
640 observes Eastern (ET), which is UTC−5 / −4 DST and follows daylight saving time.
When did area code 640 start?+–
640 entered service in 2018. Its history: overlaid on 609.
Why does area code 640 exist?+–
640 is an overlay of 609: it covers the exact same territory and was introduced when the original code ran low on new number combinations. New lines may receive either code, calls between them are local, and 10-digit dialing applies.
Is 640 a scam area code?+–
Scam and robocall traffic can use any North American code, 640 included — caller ID is easy to spoof, so the code alone does not tell you who is really calling. Check the community reports on this page before calling back an unknown 640 number, and report anything suspicious.
Can I get a 640 phone number?+–
Yes — most mobile carriers and VoIP providers let you request a 640 number regardless of where you physically live, although in an overlaid region you may be assigned 609 instead.