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: 390

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-390 A Arvin CA BKFDCA12XRX  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 734      
661-390 0 Arvin CA   6529 T-MOBILE USA, INC. 734   2009-07-10   
661-390 1 Arvin CA   6529 T-MOBILE USA, INC. 734   2013-09-12   
661-390 2 Arvin CA   6529 T-MOBILE USA, INC. 734   2014-11-23   
661-390 3 Arvin CA   6529 T-MOBILE USA, INC. 734   2011-01-03   
661-390 4 Arvin CA   337E BRIGHT HOUSE NTWS INFORMATION SVCS (CALIFORNIA) CA 734   2007-07-30   
661-390 5 Arvin CA   6529 T-MOBILE USA, INC. 734   2014-11-23   
661-390 6 Arvin CA   6529 T-MOBILE USA, INC. 734   2012-07-23   
661-390 7 Arvin CA   6529 T-MOBILE USA, INC. 734   2024-09-15   
661-390 8 Arvin CA   6529 T-MOBILE USA, INC. 734   2010-09-02   
661-390 9 Arvin CA   981E BANDWIDTH.COM CLEC, LLC - CA 734   2010-07-02   

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

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