Area Code 707-205 located in WALNUT CREEK, CONTRA COSTA, CA, more detail is as below. Place NPA (Numbering Plan Area) : 707 NXX (Local Number Prefix) : 205 City : WALNUT CREEK County : CONTRA COSTA State : CA (California) NXX Use Type : Landline NXX Intro Version : 1999-02-27 FIPS (Federal Information Processing Standards) : 06013 LATA (Local Access Transport Area) : 722 Rate Center : BENICIA ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 94598 Other Information NPANXX : 707205 Switch CLLI (Common Language Location Identifier) : SNRSCA010MD 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 : LEVEL 3 COMMUNICATIONS, LLC - CA OCN (Operating Company Number) : 8826 Coverage Area Name : WALNUT CREEK Latitude : 37.9268 Longitude : -122.0548 ‹ previous : 707-205 next › : 707-206 Telephone Number List 707-205-0000 ~ 707-205-9999