Geographic Regions and Area Codes in Denver, Colorado

Denver, Colorado, is strategically located in the South Platte River Valley on the western edge of the High Plains, just east of the Front Range of the Rocky Mountains. This central location within the Front Range Urban Corridor makes it a key metropolitan area for businesses. Denver is served by three primary area codes: 303, 720, and 983. These area codes cover not only Denver but also surrounding cities and suburbs such as Boulder, Aurora, Lakewood, Littleton, Longmont, Broomfield, and Castle Rock.

Key facts about Denver's geographic regions and area codes:

  • Located in the South Platte River Valley
  • Part of the Front Range Urban Corridor
  • Served by area codes: 303, 720, and 983
  • Includes surrounding cities like Boulder, Aurora, and Lakewood