Area Code 303-347 located in LITTLETON, ARAPAHOE, CO, more detail is as below. Place NPA (Numbering Plan Area) : 303 NXX (Local Number Prefix) : 347 City : LITTLETON County : ARAPAHOE State : CO (Colorado) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 08005 LATA (Local Access Transport Area) : 656 Rate Center : DENVER ZIP Code Count : 309 ZIP Code Frequency : 17 ZIP Code : 80122 Other Information NPANXX : 303347 County Population : 0 Switch CLLI (Common Language Location Identifier) : LTTNCOMADS0 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 : 39.6149 Longitude : -105.0090 ‹ previous : 303-347 next › : 303-347 Telephone Number List 303-347-0000 ~ 303-347-9999