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: 642

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-642 A Delano CA BKFDCA01WMD  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 734   2024-01-19   
661-642 0 Delano CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 734   2024-03-23   
661-642 1 Delano CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 734   2025-04-20   
661-642 2 Delano CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 734   2025-09-10   
661-642 6 Delano CA   7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 734   2024-01-19   
661-642 8 Delano CA   649C ONVOY, LLC - CA 734   2024-07-12   
661-642 9 Delano CA   649C ONVOY, LLC - CA 734   2024-06-29   

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

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