303 Area Code Data

Area code 303 has a total estimated population of 2,530,896 people and covers the following localities in Colorado:

  • Allenspark
  • Arvada
  • Aurora
  • Bailey
  • Bennett
  • Boulder
  • Brighton
  • Broomfield
  • Byers
  • Castle Rock
  • Central City
  • Coal Creek
  • Commerce City
  • Deer Trail
  • Denver
  • Elbert
  • Elizabeth
  • Englewood
  • Erie
  • Evergreen
  • Frederick
  • Georgetown
  • Golden
  • Hudson
  • Idaho Springs
  • Keenesburg
  • Kiowa
  • Larkspur
  • Littleton
  • Longmont
  • Louisville
  • Lyons
  • Morrison
  • Nederland
  • Niwot
  • Parker
  • Roggen
  • Strasburg
  • Ward
  • Westminster

The (303) area code is comprised of 756 unique phone exchanges: