Learn about the 603 area code, including its location, cities, time zone, introduction date, and related area codes.
603 Area Code Details
Major Cities in the 603 Area Code
The 603 area code is associated with the following cities and communities:
- Derry
- Dover
- East Concord
- Keene
- Manchester
- Nashua
- Portsmouth
- Rochester
Where Is Area Code 603 Located?
The 603 area code serves communities in New Hampshire. The exact communities and numbering assignments can change as telephone numbering resources are updated.
603 Area Code Time Zone
The 603 area code is associated with the Eastern time zone.
When Was 603 Area Code Introduced?
The 603 area code was introduced in 01-Jan-1947.
How to Call a 603 Area Code Number
For a call within the same numbering plan, dial the required local number according to your carrier’s dialing rules. For calls from outside the United States, use the United States country code (+1), followed by the area code and seven-digit telephone number.
603 Area Code FAQ
What state is 603 area code in?
The 603 area code is associated with New Hampshire.
What time zone is 603 area code in?
The 603 area code is associated with Eastern.
What cities use 603 area code?
Derry|Dover|East Concord|Keene|Manchester|Nashua|Portsmouth|Rochester
More Questions About Area Code 603
What state is area code 603 in?
Area code 603 is associated with New Hampshire.
What time zone is area code 603 in?
The listed time zone for area code 603 is Eastern.