Area code 603

North American area code 603 is New Hampshire's sole area code. 603 was created as one of the original area codes in October, 1947.

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State of New Hampshire Area Code: 603
	North: 819
West: 802	area code 603	East: 207
	South: 351/978, 413
Commonwealth of Massachusetts Area Codes: 339, 351, 413, 508, 617, 774, 781, 857, 978
State of Maine area code: 207
Province of Quebec area codes: 418, 438, 450, 514, 581, 819
State of Vermont Area Code: 802

v • d • e Lists of area codes in the North American Numbering Plan

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