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: 543

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
559-543 A Huron CA FRSNCAVVDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 728      
559-543 0 Huron CA   939H COMMIO, LLC 728   2022-12-01   
559-543 1 Huron CA   7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 728      
559-543 2 Huron CA   649C ONVOY, LLC - CA 728   2019-03-16   
559-543 3 Huron CA   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 728   2014-08-16   
559-543 4 Huron CA   649C ONVOY, LLC - CA 728   2009-12-07   
559-543 5 Huron CA   649C ONVOY, LLC - CA 728   2019-03-16   
559-543 7 Huron CA   145J TERRA NOVA TELECOM INC. 728   2024-08-27   
559-543 8 Huron CA   649C ONVOY, LLC - CA 728   2016-04-11   
559-543 9 Huron CA   649C ONVOY, LLC - CA 728   2016-04-11   

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

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