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: 387

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-387 A New Haven CT   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2025-03-24   
475-387 0 New Haven CT   732J NUSO, LLC 920   2025-04-28   
475-387 1 New Haven CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2025-04-11   
475-387 6 New Haven CT   732J NUSO, LLC 920   2025-04-28   
475-387 8 New Haven CT   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2025-03-24   
475-387 9 New Haven CT   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2025-03-24   

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

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