Area Code 408-391 located in FREMONT, ALAMEDA, CA, more detail is as below. Place NPA (Numbering Plan Area) : 408 NXX (Local Number Prefix) : 391 City : FREMONT County : ALAMEDA State : CA (California) NXX Use Type : Wireless NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 06001 LATA (Local Access Transport Area) : 722 Rate Center : SNJS WEST ZIP Code Count : 1 ZIP Code Frequency : 11 ZIP Code : 94538 Other Information NPANXX : 408391 Switch CLLI (Common Language Location Identifier) : SNTDCAUJCM9 MSA CBSA (Core Based Statistical Area) : San Francisco-Oakland-Fremont, CA MSA CBSA Code (Core Based Statistical Area) : 41860 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 : SAN JOSE Latitude : 37.3323 Longitude : -121.8893 ‹ previous : 408-391 next › : 408-391 Telephone Number List 408-391-0000 ~ 408-391-9999