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   
475-392 1 New Haven CT   490J DISH WIRELESS, LLC 920   2025-09-04   
475-392 2 New Haven CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2025-10-07   
475-392 3 New Haven CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2025-10-07   
475-392 4 New Haven CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2025-10-07   

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

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