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: 392

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-392 A New Haven CT   639C ONVOY, LLC - CT 920   2025-06-07   
475-392 0 New Haven CT   639C ONVOY, LLC - CT 920   2025-06-07   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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