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: 397

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-397 A Norwalk CT   4950 CABLEVISION LIGHTPATH, INC. - CT 920   2025-12-11   
475-397 0 Norwalk CT   4950 CABLEVISION LIGHTPATH, INC. - CT 920   2025-12-11   
475-397 1 Norwalk CT   639C ONVOY, LLC - CT 920   2026-05-21   
475-397 8 Norwalk CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2026-06-06   
475-397 9 Norwalk CT   639C ONVOY, LLC - CT 920   2026-06-22   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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