Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 475 [Rate centres in NPA 475] [Dial plan for NPA 475]

NXX: 352

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-352 A New Haven CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-03-15   
475-352 0 New Haven CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-03-15   
475-352 1 New Haven CT NWHNCT02XJX  624H ONVOY SPECTRUM, LLC 920   2024-04-10   
475-352 2 New Haven CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-03-15   
475-352 3 New Haven CT NWHNCT02XJX  624H ONVOY SPECTRUM, LLC 920   2024-04-10   
475-352 4 New Haven CT NWHNCT02XJX  624H ONVOY SPECTRUM, LLC 920   2024-04-10   
475-352 5 New Haven CT NWHNCT02XJX  624H ONVOY SPECTRUM, LLC 920   2024-04-10   
475-352 6 New Haven CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2024-03-25   
475-352 7 New Haven CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2024-03-25   
475-352 8 New Haven CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2024-03-23   
475-352 9 New Haven CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2024-03-23   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.