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: 474

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-474 A Trumbull CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920      
475-474 0 Trumbull CT   624H ONVOY SPECTRUM, LLC 920   2022-01-07   
475-474 1 Trumbull CT   624H ONVOY SPECTRUM, LLC 920   2021-11-08   
475-474 2 Trumbull CT   639C ONVOY, LLC - CT 920   2025-01-09   
475-474 3 Trumbull CT   624H ONVOY SPECTRUM, LLC 920   2021-11-08   
475-474 4 Trumbull CT   639C ONVOY, LLC - CT 920   2021-04-05   
475-474 5 Trumbull CT   639C ONVOY, LLC - CT 920   2021-04-05   
475-474 6 Trumbull CT   639C ONVOY, LLC - CT 920   2021-04-05   
475-474 7 Trumbull CT   639C ONVOY, LLC - CT 920   2021-04-05   
475-474 8 Trumbull CT   639C ONVOY, LLC - CT 920   2021-04-05   
475-474 9 Trumbull CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2021-10-28   

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

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