Area code 720 is an overlay for 303 and serves the Denver metropolitan area and its suburbs, including Boulder, Aurora, and Lakewood. Introduced in 1998, 720 supports the explosive growth of one of the fastest-growing regions in the country. Denver is a major hub for industries like aerospace, tech, finance, and energy, with employers like Lockheed Martin, Ball Corporation, and DaVita headquartered nearby. The region is known for its quality of life, outdoor recreation, and educated workforce. With rapid migration and a robust real estate market, a 720 number connects you to one of the West’s most dynamic economic centers, ideal for startups and professionals.