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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
303-403 Denver, CO Jefferson Landline
303-404 Denver, CO Adams Landline
303-405 Denver, CO Denver Landline
303-406 Denver, CO Denver Landline
303-407 Denver, CO Denver Landline
303-408 Denver, CO Denver Landline
303-409 Denver, CO Denver Landline
303-410 Denver, CO Adams Landline
303-412 Denver, CO Adams Landline
303-413 Denver, CO Jefferson Landline
303-414 Denver, CO Denver Landline
303-415 Denver, CO Jefferson Landline
303-416 Denver, CO Jefferson Landline
303-417 Denver, CO Jefferson Landline
303-418 Aurora, CO Denver Landline
303-419 Denver, CO Jefferson Cell Number
303-420 Denver, CO Jefferson Landline
303-421 Denver, CO Jefferson Landline
303-422 Denver, CO Jefferson Landline
303-423 Denver, CO Jefferson 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.

If you want to get more informatons of the areacode, Input an areacode into the above search area, get what you want.