603 Area Code

Area code 603 is the area code for New Hampshire. It is New Hampshire's only area code.

Counties that Use 603 Area Code

Major Cities that Use 603 Area Code

All Cities & Towns that Use 603 Area Code

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Where is 603 area code?

The following map shows the coverage of 603 area code. The coverage area is shown in green.

Area code map of the entire U.S.