Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 559 [Rate centres in NPA 559] [Dial plan for NPA 559]

NXX: 678

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
559-678 A Squaw Valley CA FRSMCA150MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 728      
559-678 0 Squaw Valley CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 728      
559-678 2 Squaw Valley CA   649C ONVOY, LLC - CA 728   2021-03-05   
559-678 3 Squaw Valley CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 728      
559-678 5 Squaw Valley CA   624H ONVOY SPECTRUM, LLC 728   2025-02-08   
559-678 7 Squaw Valley CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 728   2013-12-20   
559-678 8 Squaw Valley CA   649C ONVOY, LLC - CA 728   2019-03-16   
559-678 9 Squaw Valley CA   073H TELNYX LLC 728   2018-07-10   

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

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