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 BOOST SUBSCRIBERCO L.L.C. 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   
475-392 5 New Haven CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2026-06-24   
475-392 6 New Haven CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2026-06-24   
475-392 7 New Haven CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2026-06-08   
475-392 8 New Haven CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2026-02-16   
475-392 9 New Haven CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2026-06-08   

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

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