Area Code 408-203 located in SUNNYVALE, SANTA CLARA, CA, more detail is as below. Place NPA (Numbering Plan Area) : 408 NXX (Local Number Prefix) : 203 City : SUNNYVALE County : SANTA CLARA State : CA (California) NXX Use Type : Wireless NXX Intro Version : 2000-01-14 FIPS (Federal Information Processing Standards) : 06085 LATA (Local Access Transport Area) : 722 Rate Center : SUNNYVALE ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 94087 Other Information NPANXX : 408203 Switch CLLI (Common Language Location Identifier) : SNTDCAUJCM9 MSA CBSA (Core Based Statistical Area) : San Jose-Sunnyvale-Santa Clara, CA MSA CBSA Code (Core Based Statistical Area) : 41940 Time Zone : Pacific (GMT -08:00) Observes Daylight Saving Time : Yes Company : NEW CINGULAR WIRELESS PCS, LLC OCN (Operating Company Number) : 6010 Coverage Area Name : SUNNYVALE Latitude : 37.3752 Longitude : -122.0218 ‹ previous : 408-202 next › : 408-203 Telephone Number List 408-203-0000 ~ 408-203-9999