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: 328

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-328 A Darien CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
475-328 0 Darien CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920      
475-328 1 Darien CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920      
475-328 2 Darien CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920      
475-328 3 Darien CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
475-328 4 Darien CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920      
475-328 5 Darien CT NRWLCT02XMD  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
475-328 6 Darien CT HRFRCTCR3MD  318J COMCAST IP PHONE, LLC 920      
475-328 7 Darien CT NWLNCTCS6MD  508J CENTURYLINK COMMUNICATIONS, LLC 920      
475-328 8 Darien CT HRFRCT03HMD  073H TELNYX LLC 920      
475-328 9 Darien CT NRWLCT028MD  4950 CABLEVISION LIGHTPATH, INC. - CT 920      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.