Lookup › Area code 603
603 Area Code — Manchester, New Hampshire
Area code 603 serves Manchester, NH.
Most looked-up 603 numbers
Phone prefixes in 603
Carriers serving 603
- Comcast Ip Phone, LLC (2 numbers)
- Vonage America, LLC (2 numbers)
- At&t (1 numbers)
- Bell Atlantic Nynex Mobile (1 numbers)
- Consolidated Comm Of No. New E (1 numbers)
Frequently asked questions
Where is area code 603?
Area code 603 serves Manchester, NH.
What prefixes are in area code 603?
Phone2.io tracks 7 phone prefixes in area code 603, with carrier and spam-report data on individual numbers.
More about area code 603
Area code 603 overview, history, and local numbers · Get a NH phone number
Last updated: March 13, 2026