Area Code 303-577 located in AURORA, ARAPAHOE, CO, more detail is as below. Place NPA (Numbering Plan Area) : 303 NXX (Local Number Prefix) : 577 City : AURORA County : ARAPAHOE State : CO (Colorado) NXX Use Type : Landline NXX Intro Version : 2000-06-13 FIPS (Federal Information Processing Standards) : 08005 LATA (Local Access Transport Area) : 656 Rate Center : AURORA ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 80012 Other Information NPANXX : 303577 County Population : 0 Switch CLLI (Common Language Location Identifier) : DNVRCOETDS1 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 : ESCHELON TELECOM OF COLORADO, INC. - CO OCN (Operating Company Number) : 3467 Coverage Area Name : AURORA Latitude : 39.7479 Longitude : -104.8762 ‹ previous : 303-576 next › : 303-577 Telephone Number List 303-577-0000 ~ 303-577-9999