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: 274

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-274 A Guilford CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920      
475-274 0 Guilford CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2020-09-13   
475-274 1 Guilford CT   515J IP HORIZON LLC 920   2022-07-29   
475-274 2 Guilford CT   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2025-05-30   
475-274 3 Guilford CT   639C ONVOY, LLC - CT 920   2023-08-18   
475-274 4 Guilford CT   624H ONVOY SPECTRUM, LLC 920   2021-10-11   
475-274 5 Guilford CT   624H ONVOY SPECTRUM, LLC 920   2021-10-29   
475-274 6 Guilford CT   7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920   2021-01-04   
475-274 7 Guilford CT   516J TON80 COMMUNICATIONS, LLC 920   2021-07-01   
475-274 8 Guilford CT   624H ONVOY SPECTRUM, LLC 920   2021-11-01   
475-274 9 Guilford CT   490J DISH WIRELESS, LLC 920   2023-05-21   

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

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