Area code 720 is an overlay for the Denver metropolitan area in Colorado, sharing territory with 303. It was introduced in 1998 to meet growing demand in one of the nation’s fastest-expanding urban areas. Denver is known for its role in aerospace, tech, and outdoor lifestyles, attracting a mix of young professionals and longtime residents. Ten-digit dialing is required. While 303 holds historic prestige, 720 is widely used for newer lines and businesses, representing the dynamic growth and evolving identity of modern Denver.
Locations for Area Code - 720
Browse all cities and areas that belong to this area code.
Arvada
- State: CO
- Population: 115,368
- Latitude: 39.80276, Longitude: -105.08748
- Elevation: 1629 m
Aurora
- State: CO
- Population: 359,407
- Latitude: 39.72943, Longitude: -104.83192
- Elevation: 1648 m
Boulder
- State: CO
- Population: 106,803
- Latitude: 40.01499, Longitude: -105.27055
- Elevation: 1624 m
Brighton
- State: CO
- Population: 37,585
- Latitude: 39.98526, Longitude: -104.82053
- Elevation: 1519 m
Broomfield
- State: CO
- Population: 65,065
- Latitude: 39.92054, Longitude: -105.08665
- Elevation: 1644 m
Castle Rock
- State: CO
- Population: 55,591
- Latitude: 39.37221, Longitude: -104.85609
- Elevation: 1897 m
Castlewood
- State: CO
- Population: 25,271
- Latitude: 39.58471, Longitude: -104.90109
- Elevation: 1746 m
Columbine
- State: CO
- Population: 24,280
- Latitude: 39.58777, Longitude: -105.06943
- Elevation: 1688 m
Commerce City
- State: CO
- Population: 53,696
- Latitude: 39.80832, Longitude: -104.93387
- Elevation: 1572 m
Denver
- State: CO
- Population: 729,019
- Latitude: 39.73915, Longitude: -104.9847
- Elevation: 1609 m
Englewood
- State: CO
- Population: 33,082
- Latitude: 39.64777, Longitude: -104.98776
- Elevation: 1637 m
Highlands Ranch
- State: CO
- Population: 96,713
- Latitude: 39.55388, Longitude: -104.96943
- Elevation: 1732 m
Ken Caryl
- State: CO
- Population: 32,438
- Latitude: 39.57582, Longitude: -105.11221
- Elevation: 1756 m
Lafayette
- State: CO
- Population: 27,729
- Latitude: 39.9936, Longitude: -105.08971
- Elevation: 1588 m
Lakewood
- State: CO
- Population: 729,019
- Latitude: 39.73915, Longitude: -104.9847
- Elevation: 1609 m
Littleton
- State: CO
- Population: 46,368
- Latitude: 39.61332, Longitude: -105.01665
- Elevation: 1631 m
Longmont
- State: CO
- Population: 92,088
- Latitude: 40.16721, Longitude: -105.10193
- Elevation: 1519 m
Loveland
- State: CO
- Population: 75,182
- Latitude: 40.39776, Longitude: -105.07498
- Elevation: 1519 m
Northglenn
- State: CO
- Population: 39,197
- Latitude: 39.88554, Longitude: -104.9872
- Elevation: 1639 m
Parker
- State: CO
- Population: 49,550
- Latitude: 39.5186, Longitude: -104.76136
- Elevation: 1789 m
Southglenn
- State: CO
- Population: 42,268
- Latitude: 39.58721, Longitude: -104.95276
- Elevation: 1705 m
Thornton
- State: CO
- Population: 133,451
- Latitude: 39.86804, Longitude: -104.97192
- Elevation: 1631 m
Westminster
- State: CO
- Population: 116,317
- Latitude: 39.83665, Longitude: -105.0372
- Elevation: 1641 m
Wheat Ridge
- State: CO
- Population: 31,192
- Latitude: 39.7661, Longitude: -105.07721
- Elevation: 1664 m
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