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: 304

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-304 A Huntington CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920      
475-304 0 Huntington CT   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2022-05-21   
475-304 1 Huntington CT   639C ONVOY, LLC - CT 920   2023-09-11   
475-304 2 Huntington CT   624H ONVOY SPECTRUM, LLC 920   2021-12-07   
475-304 3 Huntington CT   624H ONVOY SPECTRUM, LLC 920   2021-12-07   
475-304 4 Huntington CT   639C ONVOY, LLC - CT 920   2021-12-06   
475-304 5 Huntington CT   639C ONVOY, LLC - CT 920   2021-12-06   
475-304 6 Huntington CT   639C ONVOY, LLC - CT 920   2021-12-06   
475-304 7 Huntington CT   639C ONVOY, LLC - CT 920   2021-12-06   
475-304 8 Huntington CT   639C ONVOY, LLC - CT 920   2022-01-15   
475-304 9 Huntington CT   515J IP HORIZON LLC 920   2022-07-22   

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

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