About area code 303: location, common spam callers, related area codes, and more. Includes 303 reverse phone lookup to identify spam callers.

Dec 1, 2025 · Important 303 Area Code Information Area Code 303 is located in Colorado. It covers 26 cities, including Denver, Aurora, Thornton, Arvada, and Longmont. It also covers 10 counties, …

Mar 9, 2025 · 303 is an area code located in the state of Colorado, US. The largest city it serves is Denver. Find out where 303 area code zone from, which states, counties and cities it covers. Get the …

Browse area code 303 phone numbers, prefixes and exchanges. The 303 area code serves Denver, Englewood, Aurora, Westminster, Boulder, covering 67 ZIP codes in 14 counties.

[1] Area codes 303, 720, and 983 are telephone area codes in the North American Numbering Plan (NANP) for the north-central portion of the U.S. state of Colorado. The numbering plan area (NPA) …

Area code 303 serves the state of Colorado. This area code was assigned on January 1st, 1947. On January 1st, 1947 it went into service. 303 is a General Purpose Code. 303 service area does …

Area code 303 is located in Colorado. Get the area’s map, cities covered, current time, prefixes, and dialing instructions.

What Does Area Code 303 Mean? Area code 303 is located in central Colorado and covers Denver, Aurora, Lakewood, Thornton, Arvada, Westminster, and Centennial. It has a single overlay (720) that …

303 Area Code is part of 11 counties in the state of Colorado. There are around 32 cities and 104 other places such as towns, cdps and villages in the 303 area code. Area code 303 is a telephone area …

The 303 Area Code is located in the state of Colorado. Area Code 303 is one of the 269 three-digit telephone area codes in the USA. It covers roughly 7,847,734 unique phone numbers and 1,796,047 …