Area Code 310-203 located in LOS ANGELES, LOS ANGELES, CA, more detail is as below. Place NPA (Numbering Plan Area) : 310 NXX (Local Number Prefix) : 203 City : LOS ANGELES County : LOS ANGELES State : CA (California) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 06037 LATA (Local Access Transport Area) : 730 Rate Center : BEVERLYHLS ZIP Code Count : 73 ZIP Code Frequency : 10 ZIP Code : 90035 Other Information NPANXX : 310203 County Population : 0 Switch CLLI (Common Language Location Identifier) : WLANCA01DS0 MSA CBSA (Core Based Statistical Area) : Los Angeles-Long Beach-Santa Ana, CA MSA CBSA Code (Core Based Statistical Area) : 31100 Time Zone : Pacific (GMT -08:00) Observes Daylight Saving Time : Yes Company : PACIFIC BELL OCN (Operating Company Number) : 9740 Coverage Area Name : BEVERLY HILLS Latitude : 34.0609 Longitude : -118.4099 ‹ previous : 310-203 next › : 310-203 Telephone Number List 310-203-0000 ~ 310-203-9999