Area Code 303-215 located in DENVER, JEFFERSON, CO, more detail is as below. Place NPA (Numbering Plan Area) : 303 NXX (Local Number Prefix) : 215 City : DENVER County : JEFFERSON State : CO (Colorado) NXX Use Type : Landline NXX Intro Version : 1996-04-15 FIPS (Federal Information Processing Standards) : 08059 LATA (Local Access Transport Area) : 656 Rate Center : DENVER ZIP Code Count : 48 ZIP Code Frequency : 6 ZIP Code : 80228 Other Information NPANXX : 303215 County Population : 0 Switch CLLI (Common Language Location Identifier) : GLDNCOMADS0 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 : QWEST CORPORATION OCN (Operating Company Number) : 9636 Coverage Area Name : GOLDEN Latitude : 39.7489 Longitude : -105.2114 ‹ previous : 303-215 next › : 303-215 Telephone Number List 303-215-0000 ~ 303-215-9999