603 Area Code Data

Area code 603 has a total estimated population of 1,263,481 people and covers the following localities in New Hampshire:

  • Alstead
  • Alton
  • Amesbury
  • Andover
  • Antrim
  • Ashland
  • Atkinson
  • Barnet
  • Barnstead
  • Barrington
  • Bartlett
  • Bellows Falls
  • Belmont
  • Berlin
  • Bethlehem
  • Bradford
  • Bradford
  • Brattleboro
  • Bretton Woods
  • Bristol
  • Campton
  • Canaan
  • Candia
  • Canterbury
  • Center Barnstead
  • Center Harbor
  • Center Ossipee
  • Center Sandwich
  • Charlestown
  • Claremont
  • Colebrook
  • Concord
  • Contoocook
  • Conway
  • Danbury
  • Deerfield
  • Derry
  • Dover
  • Dublin
  • Durham
  • Enfield
  • Epping
  • Epsom
  • Errol
  • Exeter
  • Fairlee
  • Farmington
  • Fitzwilliam
  • Franconia
  • Franklin
  • Fryeburg
  • Goffstown
  • Gorham
  • Greenfield
  • Greenville
  • Groveton
  • Hampstead
  • Hampton
  • Hancock
  • Hanover
  • Harrisville
  • Henniker
  • Hillsborough
  • Hinsdale
  • Hollis
  • Jackson
  • Jaffrey
  • Jefferson
  • Keene
  • Kingston
  • Laconia
  • Lancaster
  • Lebanon
  • Lisbon
  • Littleton
  • Lyme
  • Madison
  • Manchester
  • Marlborough
  • Marlow
  • Melvin Village
  • Meredith
  • Meriden
  • Merrimack
  • Milan
  • Milford
  • Milton
  • Milton Mills
  • Moultonborough
  • Nashua
  • New Boston
  • New Durham
  • New London
  • Newmarket
  • Newport
  • North Conway
  • North Haverhill
  • North Stratford
  • North Woodstock
  • Northwood
  • Nutting Lake
  • Pelham
  • Peterborough
  • Pike
  • Pittsburg
  • Pittsfield
  • Plymouth
  • Portsmouth
  • Raymond
  • Rindge
  • Rochester
  • Rumney
  • Rye Beach
  • Salem
  • Salisbury
  • Sanbornville
  • Seabrook
  • Somersworth
  • Spofford
  • Sunapee
  • Suncook
  • Tamworth
  • Tilton
  • Troy
  • Twin Mountain
  • Walpole
  • Warner
  • Warren
  • Washington
  • Weare
  • West Stewartstown
  • Westmoreland
  • White River Junction
  • Whitefield
  • Wilton
  • Winchester
  • Windsor
  • Wolfeboro
  • Woodsville

The (603) area code is comprised of 661 unique phone exchanges: