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: 391

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-391 A Bridgeport CT   639C ONVOY, LLC - CT 920   2025-05-30   
475-391 0 Bridgeport CT   639C ONVOY, LLC - CT 920   2025-05-30   
475-391 1 Bridgeport CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2025-07-08   

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

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