Zip Area Code

Area code 603

Area code 603 is a New Hampshire area code, in service since 1947.

Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

It is in the Eastern Time zone.

In service since
1947
Local dialing
ten digits; dialing 1 plus ten digits also works
Time zone
Eastern Time
ZIP codes
246

Map

Map of the 603 area codeThe shaded area shows where 603 numbers are rated, with the neighboring area codes outlined around it.207315607518413978802ManchesterNashuaConcordLaconiaKeenePlymouthClaremont
Approximate 603 coverage, drawn from U.S. Census ZIP code areas and NANPA rate centers. Dashed lines are state borders.

Main cities in area code 603

Overlays and neighboring area codes

Neighboring area codes: 207, 315, 607, 518, 413, 978, 617, 802, 508, 781.

Counties in area code 603

Towns in area code 603

And 204 more towns: every town in New Hampshire.