Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: SNFCCA21XEZ

<< 1 2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
510-212 A Fremont-Newark: Oliver DA CA 6630 USA MOBILITY WIRELESS, INC. 722      
510-218 A Fremont-Newark: Oliver DA CA 6630 USA MOBILITY WIRELESS, INC. 722      
510-308 A Oakland: Main-Piedmont DA CA 6630 USA MOBILITY WIRELESS, INC. 722      
510-321 A Oakland: Main-Piedmont DA CA 6630 USA MOBILITY WIRELESS, INC. 722   2024-01-30   
510-515 A Oakland: Main-Piedmont DA CA 6630 USA MOBILITY WIRELESS, INC. 722      
510-702 A Oakland: Main-Piedmont DA CA 6630 USA MOBILITY WIRELESS, INC. 722      
510-716 A Oakland: Main-Piedmont DA CA 6630 USA MOBILITY WIRELESS, INC. 722   2024-01-30   
510-720 A Oakland: Main-Piedmont DA CA 6630 USA MOBILITY WIRELESS, INC. 722   2024-01-30   
510-801 A Oakland: Main-Piedmont DA CA 6630 USA MOBILITY WIRELESS, INC. 722      
510-802 A Oakland: Main-Piedmont DA CA 6630 USA MOBILITY WIRELESS, INC. 722      
510-805 A Oakland: Main-Piedmont DA CA 6630 USA MOBILITY WIRELESS, INC. 722      
650-205 A South San Francisco CA 6630 USA MOBILITY WIRELESS, INC. 722      
650-217 A San Mateo CA 6630 USA MOBILITY WIRELESS, INC. 722      
650-317 A Mountain View CA 6630 USA MOBILITY WIRELESS, INC. 722      
650-371 A San Mateo CA 6630 USA MOBILITY WIRELESS, INC. 722      
707-233 A Santa Rosa CA 6630 USA MOBILITY WIRELESS, INC. 722      
707-288 A Santa Rosa CA 6630 USA MOBILITY WIRELESS, INC. 722      
707-323 A Santa Rosa CA 6630 USA MOBILITY WIRELESS, INC. 722      
707-325 A Santa Rosa CA 6630 USA MOBILITY WIRELESS, INC. 722      
925-213 A Walnut Creek CA 6630 USA MOBILITY WIRELESS, INC. 722      
925-312 A Antioch CA 6630 USA MOBILITY WIRELESS, INC. 722      
925-340 A Walnut Creek CA 6630 USA MOBILITY WIRELESS, INC. 722      
925-509 A Bishop Ranch CA 6630 USA MOBILITY WIRELESS, INC. 722      
925-920 A Walnut Creek CA 6630 USA MOBILITY WIRELESS, INC. 722      

<< 1 2

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.