Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 628 [Rate centres in NPA 628] [Dial plan for NPA 628]

NXX: 221

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
628-221 A San Francisco: Central DA CA SNVACAHZ0MD  508J CENTURYLINK COMMUNICATIONS, LLC 722      
628-221 0 San Francisco: Central DA CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2015-09-19   
628-221 1 San Francisco: Central DA CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2015-08-29   
628-221 2 San Francisco: Central DA CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2015-09-07   
628-221 3 San Francisco: Central DA CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2015-09-07   
628-221 4 San Francisco: Central DA CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2015-09-07   
628-221 5 San Francisco: Central DA CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2015-09-28   
628-221 6 San Francisco: Central DA CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2015-09-28   
628-221 7 San Francisco: Central DA CA SNVACAHZ0MD  508J CENTURYLINK COMMUNICATIONS, LLC 722   2015-08-29   
628-221 8 San Francisco: Central DA CA SNVACAHZ0MD  508J CENTURYLINK COMMUNICATIONS, LLC 722   2015-08-28   
628-221 9 San Francisco: Central DA CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2015-09-18   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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