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: 381

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-381 A Wallingford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-12-05   
475-381 0 Wallingford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-12-05   
475-381 1 Wallingford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-12-15   
475-381 8 Wallingford CT   639C ONVOY, LLC - CT 920   2025-05-10   
475-381 9 Wallingford CT   639C ONVOY, LLC - CT 920   2025-10-26   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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