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: 900

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-900 A Guilford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920      
475-900 0 Guilford CT   073H TELNYX LLC 920   2019-09-14   
475-900 1 Guilford CT   539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2019-11-16   
475-900 2 Guilford CT   539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2020-01-15   
475-900 3 Guilford CT   639C ONVOY, LLC - CT 920   2020-07-06   
475-900 4 Guilford CT   639C ONVOY, LLC - CT 920   2020-07-06   
475-900 5 Guilford CT   639C ONVOY, LLC - CT 920   2020-07-06   
475-900 6 Guilford CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2020-08-09   
475-900 7 Guilford CT   639C ONVOY, LLC - CT 920   2019-09-13   
475-900 8 Guilford CT   639C ONVOY, LLC - CT 920   2019-09-13   
475-900 9 Guilford CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2020-05-23   

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

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