Area Code 603: Manchester, New Hampshire
603 is a telephone area code serving New Hampshire, including Manchester, Concord. It is part of the North American Numbering Plan and is dialed with the country code +1.
Numbers beginning with 603 are located in New Hampshire, United States (NANP region: Statewide). The code covers Manchester, Concord.
How to Dial Area Code 603
| Calling from | What to dial |
|---|---|
| Anywhere in the US or Canada | 1 603 XXX-XXXX (10-digit dialing: 603 + 7-digit number) |
| Local call inside the same area code | 7-digit number in most areas; 10 digits where an overlay code is active |
| From the UK or Europe | 00 1 603 XXX XXXX |
| From Australia | 0011 1 603 XXX XXXX |
| From a mobile phone anywhere | +1 603 XXX XXXX |
Whatever country you are calling from, the + symbol replaces the exit code. Save the contact as +1 603 XXXXXXX and it will dial correctly from any phone in the world.
Time Zone for Area Code 603
Calls to a 603 number ring in the America/New_York time zone, standard offset UTC-05:00. Daylight saving time applies here, so the offset moves forward one hour from March to November.
Cities and Communities Served by 603
The following places fall inside the 603 calling area:
Other Area Codes in New Hampshire
These codes also serve New Hampshire. Area codes are assigned by the North American Numbering Plan Administration (NANPA).
| Area Code | Cities / Coverage |
|---|
See all 1 area codes in New Hampshire →
Frequently Asked Questions
Where is area code 603?
Area code 603 is in New Hampshire, United States. It covers Manchester, Concord.
What time zone is area code 603 in?
Area code 603 rings in the America/New_York time zone (UTC-05:00 standard).
Do I need to dial 1 before area code 603?
Yes, for a long-distance call inside the US and Canada you dial 1 first, then 603, then the seven-digit number. The 1 is the North American long-distance trunk prefix — it is not the country code. From outside North America you dial your exit code then 1 then 603.
Is area code 603 toll-free?
No. 603 is a standard geographic area code, so normal long-distance rates apply unless your plan includes them. Toll-free NANP codes are 800, 833, 844, 855, 866, 877 and 888.