Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 423 [Rate centres in NPA 423] [Dial plan for NPA 423]

NXX: 560

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-560 A Erwin TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956      
423-560 0 Erwin TN   6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2020-03-16   
423-560 1 Erwin TN   073H TELNYX LLC 956   2021-01-23   
423-560 2 Erwin TN   525E ONVOY, LLC - TN 956   2021-07-10   
423-560 3 Erwin TN   525E ONVOY, LLC - TN 956   2021-07-10   
423-560 4 Erwin TN   525E ONVOY, LLC - TN 956   2021-02-17   
423-560 5 Erwin TN   525E ONVOY, LLC - TN 956   2021-02-17   
423-560 6 Erwin TN   525E ONVOY, LLC - TN 956   2018-09-21   
423-560 7 Erwin TN   525E ONVOY, LLC - TN 956   2018-09-21   
423-560 8 Erwin TN   525E ONVOY, LLC - TN 956   2022-09-29   
423-560 9 Erwin TN   114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 956   2021-05-05   

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

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