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: 946

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-946 A Old Greenwich CT HRFRCT03XOX  965H FRACTEL, LLC 920      
475-946 0 Old Greenwich CT NWHNCT02XJX  624H ONVOY SPECTRUM, LLC 920   2021-03-12   
475-946 1 Old Greenwich CT   515J IP HORIZON LLC 920   2022-07-31   
475-946 2 Old Greenwich CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2022-09-17   
475-946 3 Old Greenwich CT HRFRCT03XOX  965H FRACTEL, LLC 920   2020-09-17   
475-946 4 Old Greenwich CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2020-11-22   
475-946 5 Old Greenwich CT NWHNCT02XJX  624H ONVOY SPECTRUM, LLC 920   2022-02-04   
475-946 6 Old Greenwich CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2020-11-22   
475-946 7 Old Greenwich CT NWHNCT02XJX  624H ONVOY SPECTRUM, LLC 920   2022-02-04   
475-946 8 Old Greenwich CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2022-09-15   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.