Area Code 303-209 located in BOULDER, BOULDER, CO, more detail is as below. Place NPA (Numbering Plan Area) : 303 NXX (Local Number Prefix) : 209 City : BOULDER County : BOULDER State : CO (Colorado) NXX Use Type : Landline NXX Intro Version : 2001-10-31 FIPS (Federal Information Processing Standards) : 08013 LATA (Local Access Transport Area) : 656 Rate Center : DENVER ZIP Code Count : 1 ZIP Code Frequency : 11 ZIP Code : 80301 Other Information NPANXX : 303209 County Population : 0 Switch CLLI (Common Language Location Identifier) : DNVRCO37DS0 MSA CBSA (Core Based Statistical Area) : Boulder, CO MSA CBSA Code (Core Based Statistical Area) : 14500 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : MCIMETRO ACCESS TRANSMISSION SERVICES LLC OCN (Operating Company Number) : 7229 Coverage Area Name : DENVER Latitude : 39.7467 Longitude : -104.9948 ‹ previous : 303-209 next › : 303-209 Telephone Number List 303-209-0000 ~ 303-209-9999