Area Code 669-721 located in SUNNYVALE, SANTA CLARA, CA, more detail is as below. Place NPA (Numbering Plan Area) : 669 NXX (Local Number Prefix) : 721 City : SUNNYVALE County : SANTA CLARA State : CA (California) NXX Use Type : Landline NXX Intro Version : 3/4/2013 FIPS (Federal Information Processing Standards) : 06085 LATA (Local Access Transport Area) : 722 Rate Center : SUNNYVALE ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 94085 Other Information NPANXX : 669721 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 Overlay : L Company : LEVEL 3 COMMUNICATIONS, LLC - CA OCN (Operating Company Number) : 8826 Coverage Area Name : SUNNYVALE Latitude : 37.3752 Longitude : -122.0218 ‹ previous : 669-666 next › : 669-777 Telephone Number List 669-721-0000 ~ 669-721-9999