603 Area Code

Q: What is the 603 area code?

The 603 area code is the only telephone code serving the entire state of New Hampshire.

Q: When was the 603 area code created?

The 603 area code was established in 1947 as one of the original North American Numbering Plan codes.

Q: Where is area code 603 located?

The 603 area code covers all of New Hampshire, including Manchester, Nashua, Concord, and Portsmouth.

Q: Does 603 have an overlay?

No, 603 is the only area code in the state of New Hampshire.

Q: What time zone is 603 in?

The 603 area code is in the Eastern Time Zone (EST/EDT).

The 603 area code is a historic telephone area code in the North American Numbering Plan (NANP), serving the entire state of New Hampshire, USA. Introduced in 1947, it is one of the original area codes and remains unique because it covers the whole state without being split or overlaid.

Understanding the 603 Area Code

The 603 area code is the sole area code for New Hampshire. Unlike many other states that have multiple codes due to population growth, New Hampshire has kept a single code for decades. This makes 603 a symbol of state identity, often used in branding and local pride.

603 Area Code Map and Geographic Location

The 603 area code map highlights the entire state of New Hampshire in the Northeastern United States. New Hampshire is part of the Eastern Time Zone (ET), which shifts between Eastern Standard Time (EST, UTC-5) and Eastern Daylight Time (EDT, UTC-4) depending on the season.

Major Cities and Regions in the 603 Area Code

Manchester
Nashua
Concord (state capital)
Dover
Rochester
Portsmouth
Keene

ZIP Codes Covered by the 603 Area Code

The 603 area code spans all ZIP codes in New Hampshire, including:

03101 - Manchester
03060 - Nashua
03301 - Concord
03820 - Dover
03867 - Rochester
03801 - Portsmouth
03431 - Keene

Time Zone

The 603 area code is located in the Eastern Time Zone (ET):

Standard Time: EST (UTC-5)
Daylight Saving: EDT (UTC-4)

Dialing, Phone & Service Details

Overlay Codes: None (603 is the only code for New Hampshire)
Local dialing: 10-digit dialing (603 + number) is required
Long-distance within the USA: Dial 1 + 603 + 7-digit number
International calls: Dial your country�s exit code + 1 + 603 + number
Services: Landline, mobile, VoIP, business, and residential telecommunication

What area code is 603? / Where's area code 603?

What area code is 603? � It is the telephone area code for the entire state of New Hampshire.

Where's area code 603? � The 603 area code is located in New Hampshire, USA, covering all cities, towns, and rural regions.

Frequently Asked Questions (FAQ) about 603 Area Code

What is the 603 area code?

The 603 area code is the only code serving the entire state of New Hampshire.

When was the 603 area code created?

It was established in 1947 as one of the original NANP codes.

Where is area code 603 located?

It covers all of New Hampshire, including Manchester, Nashua, Concord, and Portsmouth.

Does 603 have an overlay?

No, New Hampshire continues to use a single area code statewide.

What time zone is 603 in?

The 603 area code is in the Eastern Time Zone (ET).

Feature	Details
Area Code	603
Region Covered	Entire State of New Hampshire
Established	1947
Time Zone	Eastern Time Zone (EST/EDT)
Major Cities	Manchester, Nashua, Concord, Portsmouth, Dover, Keene
Overlay Codes	None
ZIP Range	Statewide (examples above)
Services	Landline, Mobile, VoIP, Business
Dialing	10-digit local dialing; international format +1 603 NXX XXXX
Country	United States of America

Ares Code	Office / Place	Address
603 Area Code	Southern New Hampshire University	2500 N River Rd, Manchester, NH 03106
603 Area Code	University of New Hampshire Manchester	88 Commercial St, Manchester, NH 03101
603 Area Code	Nashua Community College	505 Amherst St, Nashua, NH 03063
603 Area Code	New Hampshire Technical Institute	31 College Dr, Concord, NH 03301
603 Area Code	Keene State College	229 Main St, Keene, NH 03435
603 Area Code	Catholic Medical Center	100 McGregor St, Manchester, NH 03102
603 Area Code	Elliot Hospital	1 Elliot Way, Manchester, NH 03103
603 Area Code	St. Joseph Hospital	172 Kinsley St, Nashua, NH 03060
603 Area Code	Concord Hospital	250 Pleasant St, Concord, NH 03301
603 Area Code	Cheshire Medical Center	580 Court St, Keene, NH 03431
603 Area Code	TD Bank	55 S Commercial St, Manchester, NH 03101
603 Area Code	Bank of America	175 Hanover St, Manchester, NH 03104
603 Area Code	Citizens Bank	22 Temple St, Nashua, NH 03060
603 Area Code	Fidelity Bank	23 S Main St, Concord, NH 03301
603 Area Code	Merchants Bank	3 Central Square, Keene, NH 03431
603 Area Code	New Hampshire State House	107 N Main St, Concord, NH 03301
603 Area Code	Manchester City Hall	900 Elm St, Manchester, NH 03101
603 Area Code	Nashua City Hall	229 Main St, Nashua, NH 03060
603 Area Code	Keene City Hall	3 Washington St, Keene, NH 03431
603 Area Code	Concord District Court	71 N State St, Concord, NH 03301
603 Area Code	Livingston Park	57 Gould St, Manchester, NH 03103
603 Area Code	Derryfield Park	275 Hanover St, Manchester, NH 03104
603 Area Code	Mine Falls Park	200 Quincy St, Nashua, NH 03060
603 Area Code	White Park	4 White St, Concord, NH 03301
603 Area Code	Robin Hood Park	22 Roxbury St, Keene, NH 03431
603 Area Code	Currier Museum of Art	150 Ash St, Manchester, NH 03104
603 Area Code	SEE Science Center	200 Bedford St, Manchester, NH 03101
603 Area Code	Harris Center for Conservation Education	1 Plains Rd, Nashua, NH 03060
603 Area Code	New Hampshire Historical Society	30 Park St, Concord, NH 03301
603 Area Code	Horatio Colony Museum	100 West St, Keene, NH 03431
603 Area Code	Mall of New Hampshire	1500 S Willow St, Manchester, NH 03103
603 Area Code	Pheasant Lane Mall	310 Daniel Webster Hwy, Nashua, NH 03060
603 Area Code	The Loop Shopping Center	Nashua, NH 03060
603 Area Code	Steeplegate Mall	2 Chenell Dr, Concord, NH 03301
603 Area Code	Keene Downtown Shops	Central Square, Keene, NH 03431
603 Area Code	SNHU Arena	555 Elm St, Manchester, NH 03101
603 Area Code	Hilton Garden Inn Manchester Downtown	950 Elm St, Manchester, NH 03101
603 Area Code	Sheraton Manchester Hotel	700 Elm St, Manchester, NH 03101
603 Area Code	DoubleTree by Hilton Nashua	2 Somerset Pkwy, Nashua, NH 03063
603 Area Code	Grappone Conference Center	70 Constitution Ave, Concord, NH 03301
603 Area Code	Courtyard by Marriott Keene	100 Key Rd, Keene, NH 03431
603 Area Code	Manchester-Boston Regional Airport	1 Airport Rd, Manchester, NH 03103
603 Area Code	Manchester Transit Authority	Manchester, NH 03101
603 Area Code	Nashua Transit System	Nashua, NH 03060
603 Area Code	Concord Coach Lines Bus Station	45 S Main St, Concord, NH 03301
603 Area Code	Keene Amtrak Station	33 Railroad St, Keene, NH 03431

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