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.

NPA: 510 [Rate centres in NPA 510] [Dial plan for NPA 510]

NXX: 901

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
510-901 A Hayward CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
510-901 0 Hayward CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2016-09-26   
510-901 1 Hayward CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2016-09-26   
510-901 2 Hayward CA SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2016-09-27   
510-901 3 Hayward CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-09-30   
510-901 4 Hayward CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-09-30   
510-901 5 Hayward CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-09-30   
510-901 6 Hayward CA   515J IP HORIZON LLC 722   2016-09-27   
510-901 7 Hayward CA OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722   2016-10-13   
510-901 8 Hayward CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2016-09-27   
510-901 9 Hayward CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2016-09-27   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.