Question 1

Where is area code 603?

Accepted Answer

Area code 603 covers Manchester and nearby cities including Nashua, Derry, Dover in New Hampshire, in the Eastern Time.

Question 2

What cities use area code 603?

Accepted Answer

Area code 603 serves Manchester, Nashua, Derry, Dover, East Concord, and 3 other communities in New Hampshire.

Question 3

What time zone is area code 603 in?

Accepted Answer

Area code 603 is in the Eastern Time (America/New_York).

Question 4

How do you dial a 603 number?

Accepted Answer

Dial all 10 digits: 603 followed by the 7-digit local number. From abroad, dial +1 603 and the local number.

Question 5

Is a call from area code 603 a scam?

Accepted Answer

A 603 number is geographically tied to New Hampshire, but caller ID can be spoofed, so the displayed area code does not prove where a caller really is. If you did not expect the call, do not share personal information and consider looking the number up.

Question 6

Is 603 a country code?

Accepted Answer

No. 603 is a US area code (a domestic 3-digit code), not a country code. The country (calling) code for the United States is +1, shared across the North American Numbering Plan. So a full 603 number written for international dialing looks like +1 603 followed by the 7-digit local number.

Area Code 603

Cities in area code 603

Area codes by city

Carriers in area code 603

Nearby area codes