Where is Area Code 720?

The most populous cities in area code 720 are: Arvada, Westminster, Erie, Fort Lupton, and Lyons.

Other cities in the 720 area code include: Hudson, Keenesburg, Georgetown, Deer Trail, and Longmont.

Denver, officially the City and County of Denver, is the capital and most populous municipality of the U.S. state of Colorado. Denver is in the South Platte River Valley on the western edge of the High Plains just east of the Front Range of the Rocky Mountains. The Denver downtown district is immediately east of the confluence of Cherry Creek with the South Platte River, approximately 12 mi (19 km) east of the foothills of the Rocky Mountains. Denver is nicknamed the Mile-High City because its official elevation is exactly one mile (5280 feet or 1609.3 meters) above sea level, making it the highest major city in the United States.

Aurora is a Home Rule Municipality in the U.S. state of Colorado, spanning Arapahoe and Adams counties, with the extreme southeastern portion of the city extending into Douglas County. Aurora is one of the principal cities of the Denver-Aurora-Lakewood, CO Metropolitan Statistical Area (Metro Denver). The city's population was 325,078 in the 2010 census, which made it the third most populous city in the state of Colorado and the 54th most populous city in the United States.The Denver-Aurora-Lakewood, CO Metropolitan Statistical Area had an estimated population of 2,645,209 on July 1, 2012 (the 21st most populous MSA in the U.S.).

Littleton is the Home Rule Municipality in Arapahoe, Douglas, and Jefferson counties that is the county seat of Arapahoe County, Colorado, United States. The city is a part of the Denver-Aurora-Lakewood, CO Metropolitan Statistical Area. The city population was 41,737 at the 2010 United States Census, ranking as the 20th most populous municipality in the State of Colorado.

The 720 area code lies within the Mountain Daylight Time Zone (or MDT). The current time in MDT is 1:22 PM on Jul 11, 2020.