New Hampshire Area Code

The area code for New Hampshire is primarily 603, covering the entire state. Area codes are used in telecommunications to designate specific geographic regions for telephone numbers. It's important to note that area codes can change or new ones can be introduced over time to meet the demand for phone numbers in a given area.

State New Hampshire
State Abbreviation: NH
State Nickname: The Granite State Equality State
Capital City Concord
Area Codes 603
Timezone Eastern Time (ET)
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What time zone is New Hampshire?

New Hampshire, with the 603 area code, is in the Eastern Time Zone (ET). It follows Eastern Standard Time (EST) during Standard Time (UTC-5) and Eastern Daylight Time (EDT) during Daylight Saving Time (UTC-4).

Note that the start and end dates of daylight saving time can change


The history of New Hampshire's area code is relatively straightforward. Since its inception in 1947, the state has used the single area code, 603, to cover its entire territory. Over the years, this area code has remained unchanged, with no splits or overlays. As of my last knowledge update in September 2021, New Hampshire continued to use the 603 area code as its exclusive identifier, serving all of its telecommunications needs. Please note that area codes can change, so it's advisable to verify the current status if you need the most up-to-date information.

All Area Codes in New Hampshire

This table provides a quick overview of all area codes, their locations, and some historical context for each.

Area Code Location History and Details
603 Entire New Hampshire Covers the entire state of New Hampshire as the primary area code.

Largest Cities in New Hampshire with area codes

Quick overview of large cities, their area codes, and some historical context for each in New Hampshire.

Name Area Code History and Details
Manchester 603 New Hampshire's largest city and an economic hub.
Nashua 603 Second-largest city in New Hampshire, located in the south near the Massachusetts border.
Concord 603 The state capital of New Hampshire, centrally located within the state.
Derry 603 Located in Rockingham County, part of the Greater Boston metropolitan area.
Rochester 603 City situated in Strafford County in southeastern New Hampshire.
Salem 603 Town in Rockingham County known for its vibrant community and commercial presence.
Dover 603 City in Strafford County, notable for its historic downtown area.
Keene 603 Located in southwestern New Hampshire, known for its picturesque surroundings.
Portsmouth 603 Coastal city in Rockingham County, known for its historic waterfront and cultural attractions.
Laconia 603 Located in Belknap County, known for its scenic beauty and access to Lake Winnipesaukee.