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: 315

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
628-315 A Belvedere CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2024-11-28   
628-315 0 Belvedere CA   114J EXIANT COMMUNICATIONS LLC 722   2026-10-12   
628-315 1 Belvedere CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2025-12-19   
628-315 2 Belvedere CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2025-12-19   
628-315 3 Belvedere CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2025-12-19   
628-315 4 Belvedere CA   114J EXIANT COMMUNICATIONS LLC 722   2026-09-14   
628-315 5 Belvedere CA   114J EXIANT COMMUNICATIONS LLC 722   2026-10-12   
628-315 7 Belvedere CA   824J OPENTACT INC. 722   2026-10-12   
628-315 9 Belvedere CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2024-11-28   

Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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