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: 690

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-690 A Delano CA BKFDCA01X2X  6529 T-MOBILE USA, INC. 734      
661-690 0 Delano CA   649C ONVOY, LLC - CA 734   2019-06-13   
661-690 1 Delano CA   649C ONVOY, LLC - CA 734   2019-06-13   
661-690 2 Delano CA   649C ONVOY, LLC - CA 734   2019-06-13   
661-690 3 Delano CA   649C ONVOY, LLC - CA 734   2019-06-13   
661-690 4 Delano CA   649C ONVOY, LLC - CA 734   2020-02-10   
661-690 5 Delano CA   649C ONVOY, LLC - CA 734   2020-02-10   
661-690 6 Delano CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 734   2020-08-10   
661-690 7 Delano CA   649C ONVOY, LLC - CA 734   2019-10-14   
661-690 8 Delano CA   6529 T-MOBILE USA, INC. 734   2019-08-09   
661-690 9 Delano CA   6529 T-MOBILE USA, INC. 734   2019-06-09   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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