Everything you need to know about area code 603 in New Hampshire
QUICK FACTS
New Hampshire
Eastern Time Zone
Original area code
Estimated residents served
New Hampshire
Primary code for this region
ABOUT THIS AREA CODE
Area code 603 covers the entire state of New Hampshire including Manchester, Nashua, and Concord. It is the only area code for the Granite State.
Phone numbers with the 603 area code follow the format (603) XXX-XXXX, where the next three digits represent the local exchange. The 603 area code is part of the North American Numbering Plan (NANP) and is regulated by the Federal Communications Commission (FCC).
If you receive a call from a 603 number that you don't recognize, you can search it using the lookup tool above. While the 603 area code legitimately serves millions of residents and businesses in the Manchester area, scammers sometimes spoof local area codes to make their calls appear more trustworthy. Always verify unfamiliar numbers before returning calls or sharing personal information.
The Manchester region served by area code 603 is one of the most significant areas in New Hampshire. As a primary geographic code, 603 has been the main identifier for this region since the original numbering plan was established.
For detailed information about any phone number in the 603 area code, including owner identification, carrier data, and spam reports, use our search tool above or visit one of our trusted lookup providers.
CITIES & COMMUNITIES
SPAM & SCAM ALERTS
These are frequently reported scam patterns from phone numbers using the 603 area code. Scammers often spoof area codes, so a call appearing to come from 603 may originate elsewhere.
Callers impersonate a grandchild in trouble, claiming to need bail money or emergency funds wired immediately.
Automated messages claim a package could not be delivered and direct you to a phishing website to reschedule delivery.
Callers offer fake student loan forgiveness programs, collecting personal and financial information under the pretense of reducing your debt.
Stay Safe: Never share personal information with incoming callers. If suspicious, hang up and search the number above.
FREQUENTLY ASKED QUESTIONS
Area code 603 serves Manchester, New Hampshire. Area code 603 covers the entire state of New Hampshire including Manchester, Nashua, and Concord. It is the only area code for the Granite State.
Area code 603 is in the Eastern timezone. Calls from 603 numbers originate from the Manchester region.
Not necessarily. Area code 603 serves many people in Manchester. However, scammers can spoof any area code. If you receive a suspicious call from a 603 number, search it above before calling back.
Area code 603 was one of the original area codes established in 1947. It serves as the primary geographic code for its region.
RELATED AREA CODES
WHO CALLED ME
If you received an unknown call from a 603 number, use our dedicated lookup page to identify the caller and check for scam reports.
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