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: 553

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-553 A Delano CA BKFDCA11EMD  981E BANDWIDTH.COM CLEC, LLC - CA 734      
661-553 0 Delano CA   981E BANDWIDTH.COM CLEC, LLC - CA 734   2015-06-28   
661-553 1 Delano CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 734   2018-12-09   
661-553 2 Delano CA   6529 T-MOBILE USA, INC. 734   2019-02-15   
661-553 3 Delano CA   649C ONVOY, LLC - CA 734   2018-04-30   
661-553 4 Delano CA   649C ONVOY, LLC - CA 734   2018-04-30   
661-553 5 Delano CA   5562 METROPCS, INC. 734   2017-08-12   
661-553 6 Delano CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 734   2016-07-31   
661-553 7 Delano CA   073H TELNYX LLC 734   2017-03-24   
661-553 8 Delano CA   6529 T-MOBILE USA, INC. 734   2017-04-03   
661-553 9 Delano CA   6529 T-MOBILE USA, INC. 734   2016-12-16   

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

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