What area code is 603?
Here's everything about it.
Instant lookup for the 603 area code — location, time zone, cities served, and who's been calling from it. No sign-up, no app.
603 at a glance
Summary
Cities & regions served by 603
Statewide New Hampshire1 community on record for 603.
Where 603 sits on the map
No overlayCoverage area
About the 603 region
603 covers Statewide New Hampshire in New Hampshire. The code has been in service since 1947 and is one of the original North American area codes.
603 currently has no overlay, so its territory keeps a single, unshared code.
Who called me from 603?
Community reports- Caller ID is trivially spoofed: an incoming call that displays 603 does not prove the caller is really in the 603 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 603 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 603 number below.
Frequently asked questions
FAQWhat area code is 603?+–
603 is a telephone area code serving Statewide New Hampshire in New Hampshire, United States, in service since 1947.
Where is area code 603 located?+–
It covers New Hampshire, including Statewide New Hampshire in New Hampshire.
What time zone is 603?+–
603 observes Eastern (ET), which is UTC−5 / −4 DST and follows daylight saving time.
When did area code 603 start?+–
603 entered service in 1947 as one of the original 1947 North American area codes.
Is 603 a scam area code?+–
Scam and robocall traffic can use any North American code, 603 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 603 number, and report anything suspicious.
Can I get a 603 phone number?+–
Yes — most mobile carriers and VoIP providers let you request a 603 number regardless of where you physically live.