Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 657 [Rate centres in NPA 657] [Dial plan for NPA 657]

NXX: 835

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-835 A Anaheim CA   6529 T-MOBILE USA, INC. 730   2026-01-10   
657-835 0 Anaheim CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2026-03-06   
657-835 5 Anaheim CA   6529 T-MOBILE USA, INC. 730   2026-02-06   
657-835 6 Anaheim CA   6529 T-MOBILE USA, INC. 730   2026-02-06   
657-835 7 Anaheim CA   6529 T-MOBILE USA, INC. 730   2026-02-06   
657-835 8 Anaheim CA   6529 T-MOBILE USA, INC. 730   2026-01-10   
657-835 9 Anaheim CA   6529 T-MOBILE USA, INC. 730   2026-01-10   

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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