Area Code 303-330 located in DENVER, JEFFERSON, CO, more detail is as below. Place NPA (Numbering Plan Area) : 303 NXX (Local Number Prefix) : 330 City : DENVER County : JEFFERSON State : CO (Colorado) NXX Use Type : Landline NXX Intro Version : 3/9/2006 FIPS (Federal Information Processing Standards) : 08059 LATA (Local Access Transport Area) : 656 Rate Center : DENVER ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 80214 Other Information NPANXX : 303330 County Population : 0 Switch CLLI (Common Language Location Identifier) : DNVRCO26WBA 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 : 360NETWORKS (USA) INC. - CO OCN (Operating Company Number) : 764D Coverage Area Name : DENVER Latitude : 39.7454 Longitude : -105.0512 ‹ previous : 303-329 next › : 303-331 Telephone Number List 303-330-0000 ~ 303-330-9999