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: 308

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
628-308 A San Francisco: Montrose-Evergreen DA CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2024-09-20   
628-308 0 San Francisco: Montrose-Evergreen DA CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2024-11-08   
628-308 6 San Francisco: Montrose-Evergreen DA CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2024-09-20   
628-308 8 San Francisco: Montrose-Evergreen DA CA   433E SONIC TELECOM, LLC - CA 722   2025-05-28   
628-308 9 San Francisco: Montrose-Evergreen DA CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2024-09-20   

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

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