303 Area Code Phone Numbers

Where is Area Code 303?

The 303 area code is assigned to Colorado. Area code 303 is one of 325 three-digit telephone area codes in the America. There are about 1,299,278 unique phone numbers and 2,223,654 individuals near the cities of Denver,Aurora,Lakewood.

State:Colorado
Major City:Denver
Timezone:Mountain
Current Time: 15:55pm

Major Cities in 303 Area Code

  • Denver
  • Aurora
  • Lakewood
  • Thornton
  • Arvada
  • Westminster
  • Centennial
  • Boulder
Area Code 303 Map
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