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: 246

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-246 A Brea CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
657-246 0 Brea CA   649C ONVOY, LLC - CA 730   2014-11-11   
657-246 1 Brea CA   649C ONVOY, LLC - CA 730   2014-11-11   
657-246 2 Brea CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2015-02-13   
657-246 3 Brea CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2015-02-13   
657-246 4 Brea CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2020-01-15   
657-246 5 Brea CA   6529 T-MOBILE USA, INC. 730   2014-11-04   
657-246 6 Brea CA   6529 T-MOBILE USA, INC. 730   2015-09-19   
657-246 7 Brea CA   6529 T-MOBILE USA, INC. 730   2015-09-19   
657-246 8 Brea CA   6529 T-MOBILE USA, INC. 730   2016-05-31   
657-246 9 Brea CA   6529 T-MOBILE USA, INC. 730   2014-11-01   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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