What time zone is area code 603 in?

Area code 603 uses Eastern Time.

Is a call from area code 603 a scam?

The area code alone doesn’t tell you. Most calls from 603 are ordinary local calls, but scammers can fake (“spoof”) any number. If you don’t recognize a 603 number, let it go to voicemail.

Can a 603 number be outside New Hampshire?

Yes. People keep their numbers when they move and when they switch to mobile or internet phone services, so a 603 caller can be anywhere.

Area code 603

Where is area code 603?

Manchester, Nashua and Concord, New Hampshire

Local time: … (Eastern Time)

State	New Hampshire
Country	United States
Main cities	Manchester, Nashua and Concord
Time zone	Eastern Time
Overlay area codes	None
In service since	1947
Assigned prefixes	752
Dialing format	(603) XXX-XXXX · +1 603 XXX XXXX from abroad

Look up a 603 number

Cities and towns in area code 603

Listed by how many phone prefixes (the 3 digits after the area code) are assigned to each place in 603.

Manchester, NH (80)
Nashua, NH (58)
Concord, NH (39)
Derry, NH (29)
Dover, NH (29)
Portsmouth, NH (28)
Merrimack, NH (23)
Salem, NH (20)
Laconia, NH (18)
Keene, NH (17)
Rochester, NH (16)
Exeter, NH (15)
Milford, NH (11)
Lebanon, NH (10)
Plymouth, NH (10)
Suncook, NH (9)
Claremont, NH (8)
Hampton, NH (8)
West Lebanon, NH (8)
Durham, NH (7)
Plaistow, NH (7)
Bedford, NH (6)
Berlin, NH (6)
Hanover, NH (6)
Littleton, NH (6)
Meredith, NH (6)
Peterborough, NH (6)
Lancaster, NH (5)
Newport, NH (5)
North Conway, NH (5)
Raymond, NH (5)
Sunapee, NH (5)
Colebrook, NH (4)
Conway, NH (4)
Ctrossipee, NH (4)
Goffstown, NH (4)
Lincoln, NH (4)
Moultonborough, NH (4)
New Boston, NH (4)
Seabrook, NH (4)
Tilton, NH (4)
Barrington, NH (3)
Bristol, NH (3)
Campton, NH (3)
Canaan, NH (3)
Candia, NH (3)
Danbury, NH (3)
Deerfield, NH (3)
Epping, NH (3)
Greenfield, NH (3)
Hampstead, NH (3)
Hollis, NH (3)
Jaffrey, NH (3)
Kingston, NH (3)
Lyme, NH (3)
Milan, NH (3)
Newmarket, NH (3)
North Hampton, NH (3)
Orford, NH (3)
Pelham, NH (3)
Pike, NH (3)
So Hampton, NH (3)
Somersworth, NH (3)
Tamworth, NH (3)
Wchestefld, NH (3)
Wolfeboro, NH (3)
Woodsville, NH (3)
Alstead, NH (2)
Alton, NH (2)
Andover, NH (2)
Antrim, NH (2)
Ashland, NH (2)
Barnstead, NH (2)
Bartlett, NH (2)
Belmont, NH (2)
Boscawen, NH (2)
Canterbury, NH (2)
Charlestown, NH (2)
Chester, NH (2)
Chichester, NH (2)
Ctrbarnste, NH (2)
Enfield, NH (2)
Epsom, NH (2)
Errol, NH (2)
Farmington, NH (2)
Franklin, NH (2)
Glntnirwrs, NH (2)
Gorham, NH (2)
Henniker, NH (2)
Hillsboro, NH (2)
Jackson, NH (2)
Jefferson, NH (2)
Lisbon, NH (2)
Meriden, NH (2)
Milton, NH (2)
Monroe, NH (2)
New Durham, NH (2)
New Ipswich, NH (2)
New London, NH (2)
Northwood, NH (2)
Penacook, NH (2)
Plainfield, NH (2)
Rindge, NH (2)
Salisbury, NH (2)
Sanbornville, NH (2)
Spofford, NH (2)
Sutton, NH (2)
Troy, NH (2)
Walpole, NH (2)
Warner, NH (2)
Washington, NH (2)
Winchester, NH (2)
Atkinson, NH (1)
Bethlehem, NH (1)
Bradford, NH (1)
Bretton Wd, NH (1)
Chatham, NH (1)
Contoocook, NH (1)
Dublin, NH (1)
Dunbarton, NH (1)
Eastconway, NH (1)
Fitzwilliam, NH (1)
Franconia, NH (1)
Gilford, NH (1)
Groveton, NH (1)
Hancock, NH (1)
Harrisvl, NH (1)
Hinsdale, NH (1)
Hllsbupvlg, NH (1)
Madison, NH (1)
Marlborough, NH (1)
Marlow, NH (1)
Melvin Vlg, NH (1)
Milton Ml, NH (1)
No Stratfd, NH (1)
No Walpole, NH (1)
North Haverhill, NH (1)
Piermont, NH (1)
Pittsburg, NH (1)
Pittsfield, NH (1)
Rumney, NH (1)
Sullivan, NH (1)
Twin Mt, NH (1)
Warren, NH (1)
Weare, NH (1)
Westmoreld, NH (1)
Whitefield, NH (1)
Wilton, NH (1)
Wstewatstn, NH (1)

Phone companies in area code 603

The carriers that hold the most 603 prefixes. People can move their number to another carrier, so this shows who first issued a number, not who serves it today.

Prefixes	Carrier
246	Consolidated Comm of No. New England-Nh
74	Bell Atlantic Mobile
58	Paetec Itel
45	Mcimetro Access Transmission Services
40	Comcast IP Phone
38	Omnipoint Miami E License (T-Mobile)
37	United States Cellular (UScellular)
37	Level 3 Communications

All 752 prefixes in area code 603

Pick the 3 digits after the area code to see that prefix’s city and carrier.

Questions

Where is area code 603?: Area code 603 is in New Hampshire. It serves Manchester, Nashua, Concord, Derry and Dover and 144 other cities and towns.
What time zone is area code 603 in?: Area code 603 uses Eastern Time.
Is a call from area code 603 a scam?: The area code alone doesn’t tell you. Most calls from 603 are ordinary local calls, but scammers can fake (“spoof”) any number. If you don’t recognize a 603 number, let it go to voicemail.
When did area code 603 start?: 603 went into service in 1947.
Can a 603 number be outside New Hampshire?: Yes. People keep their numbers when they move and when they switch to mobile or internet phone services, so a 603 caller can be anywhere.