Area Code 951-977 located in RIVERSIDE, RIVERSIDE, CA, more detail is as below. Place NPA (Numbering Plan Area) : 951 NXX (Local Number Prefix) : 977 City : RIVERSIDE County : RIVERSIDE State : CA (California) NXX Use Type : Landline NXX Intro Version : 2004-12-13 FIPS (Federal Information Processing Standards) : 06065 LATA (Local Access Transport Area) : 730 Rate Center : ARLINGTON ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 92506 Other Information NPANXX : 951977 Switch CLLI (Common Language Location Identifier) : RVSDCAMLDS0 MSA CBSA (Core Based Statistical Area) : Riverside-San Bernardino-Ontario, CA MSA CBSA Code (Core Based Statistical Area) : 40140 Time Zone : Pacific (GMT -08:00) Observes Daylight Saving Time : Yes Company : TW TELECOM OF CALIFORNIA LP - CA OCN (Operating Company Number) : 7718 Coverage Area Name : RIVERSIDE Latitude : 34.0030 Longitude : -117.3330 ‹ previous : 951-973 next › : 951-977 Telephone Number List 951-977-0000 ~ 951-977-9999