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: 278

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-278 A Edwards CA BKFDCA12DS1  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-278 0 Edwards CA   649C ONVOY, LLC - CA 734   2021-08-13   
661-278 1 Edwards CA   7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-278 2 Edwards CA   145J TERRA NOVA TELECOM INC. 734   2024-11-12   
661-278 4 Edwards CA   145J TERRA NOVA TELECOM INC. 734   2026-02-05   

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

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