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603 Area Code Phone Directory

Phone Prefixes in the 603 Area Code

(603) 2XX (603) 3XX (603) 4XX (603) 5XX (603) 6XX (603) 7XX (603) 8XX (603) 9XX

Information for Area Code 603

State: NH

Largest City in Area: MANCHESTER

Where is Area Code 603?

Area code (603) is in the state of NH. Below, are the major cities in the area code (603).

Area Codes Starting with 6

Major Cities in 603

MANCHESTER, NH (541,034)

NASHUA, NH (371,318)

CONCORD, NH (221,118)

DERRY, NH (187,388)

DOVER, NH (178,575)

ROCHESTER, NH (153,545)

PORTSMOUTH, NH (134,737)

MERRIMACK, NH (133,043)

SALEM, NH (120,465)

HUDSON, NH (118,790)

Zip Codes in 603

03031

03032

03033

03034

03036

03037

03038

03040

03041

03042

03043

03044

03045

03046

03047

03048

03049

03051

03052

03053

03054