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: 831

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
559-831 A Madera CA FRSNCAQRAMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 728      
559-831 0 Madera CA   073H TELNYX LLC 728   2017-03-24   
559-831 1 Madera CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 728   2015-06-04   
559-831 2 Madera CA   318J COMCAST IP PHONE, LLC 728   2015-05-29   
559-831 3 Madera CA   649C ONVOY, LLC - CA 728   2017-06-12   
559-831 4 Madera CA   649C ONVOY, LLC - CA 728   2019-03-16   
559-831 5 Madera CA   649C ONVOY, LLC - CA 728   2019-03-16   
559-831 6 Madera CA   649C ONVOY, LLC - CA 728   2019-03-16   
559-831 7 Madera CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 728   2023-07-10   
559-831 8 Madera CA   6529 T-MOBILE USA, INC. 728   2016-06-16   
559-831 9 Madera CA   6529 T-MOBILE USA, INC. 728   2016-06-16   

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

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