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: 628 [Rate centres in NPA 628] [Dial plan for NPA 628]

NXX: 588

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
628-588 A San Francisco: Central DA CA SNJUCACL7MD  965H FRACTEL, LLC 722      
628-588 0 San Francisco: Central DA CA SNRTCAHFDS0  433E SONIC TELECOM, LLC - CA 722   2021-10-11   
628-588 1 San Francisco: Central DA CA SNJUCACL2MD  197D VONAGE AMERICA LLC 722   2021-08-11   
628-588 2 San Francisco: Central DA CA OKLECAZVGT0  6529 T-MOBILE USA, INC. 722   2021-12-05   
628-588 3 San Francisco: Central DA CA SNJUCACL2MD  197D VONAGE AMERICA LLC 722   2021-08-11   
628-588 4 San Francisco: Central DA CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2021-04-30   
628-588 5 San Francisco: Central DA CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2021-04-30   
628-588 6 San Francisco: Central DA CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2021-04-30   
628-588 7 San Francisco: Central DA CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2021-04-30   
628-588 8 San Francisco: Central DA CA SNJUCACL7MD  965H FRACTEL, LLC 722   2021-04-09   
628-588 9 San Francisco: Central DA CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2021-04-30   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.