Area Code 303 - Denver, CO

Below is the information for Area Code 303
General Information for Area Code 303
Country United States
State/Province Colorado
Major City Denver
Time Zone Mountain (UTC-07:00)

Phone directory of numbers beginning with Area Code 303 Prefixes

Prefix Primary City County Phone Type
303-323 Denver, CO Denver Landline
303-324 Denver, CO Jefferson Cell Number
303-325 Denver, CO Denver Landline
303-326 Aurora, CO Arapahoe Landline
303-327 Denver, CO Denver Landline
303-328 Denver, CO Denver Landline
303-329 Denver, CO Denver Landline
303-330 Denver, CO Jefferson Landline
303-331 Denver, CO Denver Landline
303-332 Denver, CO Jefferson Cell Number
303-333 Denver, CO Denver Landline
303-334 Denver, CO Denver Landline
303-335 Denver, CO Denver Landline
303-336 Denver, CO Denver Landline
303-337 Aurora, CO Arapahoe Landline
303-338 Aurora, CO Arapahoe Landline
303-339 Denver, CO Jefferson Landline
303-340 Aurora, CO Arapahoe Landline
303-341 Aurora, CO Arapahoe Landline
303-342 Aurora, CO Adams Landline
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Location Details

Area code is a type of numbering scheme used in telecommunication. It divides the territories of its member countries, the code is a three-digit code. The digits 0 and 1 applied for central office codes. Other digits were applied into geographic areas of the service territory.

  • 200: easily recognizable code (ERC)
  • 201: New Jersey
  • 202: Washington, D.C.
  • 203: Connecticut
  • and so on.

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