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: 477

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-477 A Stamford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920      
475-477 0 Stamford CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2020-02-24   
475-477 1 Stamford CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2020-01-17   
475-477 2 Stamford CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2020-02-24   
475-477 3 Stamford CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2020-02-24   
475-477 4 Stamford CT   639C ONVOY, LLC - CT 920   2020-01-16   
475-477 5 Stamford CT   639C ONVOY, LLC - CT 920   2020-01-16   
475-477 6 Stamford CT   639C ONVOY, LLC - CT 920   2020-01-16   
475-477 7 Stamford CT   639C ONVOY, LLC - CT 920   2020-01-16   
475-477 8 Stamford CT   639C ONVOY, LLC - CT 920   2020-03-02   
475-477 9 Stamford CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2020-02-24   

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

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