Area Code 310-437 located in SAN FRANCISCO, SAN FRANCISCO, CA, more detail is as below. Place NPA (Numbering Plan Area) : 310 NXX (Local Number Prefix) : 437 City : SAN FRANCISCO County : SAN FRANCISCO State : CA (California) NXX Use Type : Landline NXX Intro Version : 1998-01-25 FIPS (Federal Information Processing Standards) : 06075 LATA (Local Access Transport Area) : 730 Rate Center : SNMN MRVS ZIP Code Count : 1 ZIP Code Frequency : 25 ZIP Code : 94105 Other Information NPANXX : 310437 County Population : 0 Switch CLLI (Common Language Location Identifier) : LNBHCATVDS0 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 : XO CALIFORNIA, INC. OCN (Operating Company Number) : 7262 Coverage Area Name : MAR VISTA Latitude : 33.9976 Longitude : -118.4225 ‹ previous : 310-437 next › : 310-437 Telephone Number List 310-437-0000 ~ 310-437-9999