Area Code 303-204 located in AURORA, ARAPAHOE, CO, more detail is as below. Place NPA (Numbering Plan Area) : 303 NXX (Local Number Prefix) : 204 City : AURORA County : ARAPAHOE State : CO (Colorado) NXX Use Type : Wireless NXX Intro Version : 1997-04-01 FIPS (Federal Information Processing Standards) : 08005 LATA (Local Access Transport Area) : 656 Rate Center : DENVER ZIP Code Count : 1 ZIP Code Frequency : 33 ZIP Code : 80012 Other Information NPANXX : 303204 County Population : 0 Switch CLLI (Common Language Location Identifier) : ENWDCOFFCM2 MSA CBSA (Core Based Statistical Area) : Denver-Aurora, CO MSA CBSA Code (Core Based Statistical Area) : 19740 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO OCN (Operating Company Number) : 6567 Coverage Area Name : DENVER Latitude : 39.7454 Longitude : -105.0512 ‹ previous : 303-203 next › : 303-204 Telephone Number List 303-204-0000 ~ 303-204-9999