Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 925 [Rate centres in NPA 925] [Dial plan for NPA 925]

NXX: 554

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
925-554 A Antioch CA   6529 T-MOBILE USA, INC. 722   2026-03-05   
925-554 5 Antioch CA   6529 T-MOBILE USA, INC. 722   2026-03-05   
925-554 6 Antioch CA   6529 T-MOBILE USA, INC. 722   2026-03-05   
925-554 7 Antioch CA   6529 T-MOBILE USA, INC. 722   2026-03-05   
925-554 8 Antioch CA   6529 T-MOBILE USA, INC. 722   2026-03-05   
925-554 9 Antioch CA   6529 T-MOBILE USA, INC. 722   2026-03-05   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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