Area Code 303-403 located in BROOMFIELD, JEFFERSON, CO, more detail is as below. Place NPA (Numbering Plan Area) : 303 NXX (Local Number Prefix) : 403 City : BROOMFIELD 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 : 189 ZIP Code Frequency : 12 ZIP Code : 80021 Other Information NPANXX : 303403 County Population : 0 Switch CLLI (Common Language Location Identifier) : ARVDCOMADS0 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 : DENVER Latitude : 39.8003 Longitude : -105.0795 ‹ previous : 303-403 next › : 303-403 Telephone Number List 303-403-0000 ~ 303-403-9999