Area Code 909-540 located in RIVERSIDE, RIVERSIDE, CA, more detail is as below. Place NPA (Numbering Plan Area) : 909 NXX (Local Number Prefix) : 540 City : RIVERSIDE County : RIVERSIDE State : CA (California) NXX Use Type : Wireless NXX Intro Version : 1997-07-06 FIPS (Federal Information Processing Standards) : 06065 LATA (Local Access Transport Area) : 730 Rate Center : RIVERSIDE ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 92506 Other Information NPANXX : 909540 Switch CLLI (Common Language Location Identifier) : LSANCARCCMA 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 : 33 WIRELESS INC. OCN (Operating Company Number) : 6967 Coverage Area Name : RIVERSIDE Latitude : 33.9841 Longitude : -117.3649 ‹ previous : 909-539 next › : 909-540 Telephone Number List 909-540-0000 ~ 909-540-9999