Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 661 [Rate centres in NPA 661] [Dial plan for NPA 661]

NXX: 766

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-766 A Cuyama CA CUYMCAXFRS1  4420 FRONTIER CALIFORNIA INC. 734      
661-766 0 Cuyama CA   649C ONVOY, LLC - CA 734   2019-02-22   
661-766 1 Cuyama CA   649C ONVOY, LLC - CA 734   2019-02-22   
661-766 2 Cuyama CA   4420 FRONTIER CALIFORNIA INC. 734      
661-766 3 Cuyama CA   649C ONVOY, LLC - CA 734   2011-05-22   
661-766 4 Cuyama CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 734   2005-07-30   
661-766 5 Cuyama CA   649C ONVOY, LLC - CA 734   2017-04-04   
661-766 7 Cuyama CA   508J CENTURYLINK COMMUNICATIONS, LLC 734   2015-05-05   
661-766 8 Cuyama CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 734   2018-08-31   
661-766 9 Cuyama CA   145J TERRA NOVA TELECOM INC. 734   2022-04-12   

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

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