Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 475 [Rate centres in NPA 475] [Dial plan for NPA 475]

NXX: 405

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-405 A Cheshire CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920      
475-405 0 Cheshire CT   624H ONVOY SPECTRUM, LLC 920   2021-03-12   
475-405 1 Cheshire CT   639C ONVOY, LLC - CT 920   2020-07-26   
475-405 2 Cheshire CT   639C ONVOY, LLC - CT 920   2020-07-26   
475-405 3 Cheshire CT   639C ONVOY, LLC - CT 920   2020-07-26   
475-405 4 Cheshire CT   639C ONVOY, LLC - CT 920   2021-03-04   
475-405 5 Cheshire CT   639C ONVOY, LLC - CT 920   2021-03-04   
475-405 6 Cheshire CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2021-05-15   
475-405 8 Cheshire CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2021-05-15   
475-405 9 Cheshire CT   539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2020-09-26   

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

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