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: 558

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-558 A New Canaan CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920      
475-558 0 New Canaan CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2015-06-25   
475-558 1 New Canaan CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2015-06-25   
475-558 2 New Canaan CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2019-08-09   
475-558 3 New Canaan CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2019-08-09   
475-558 4 New Canaan CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2020-02-24   
475-558 5 New Canaan CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2020-07-06   
475-558 6 New Canaan CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2018-08-31   
475-558 7 New Canaan CT HRFRCT03HMD  073H TELNYX LLC 920   2017-06-05   
475-558 8 New Canaan CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2015-07-03   
475-558 9 New Canaan CT NRWLCT028MD  4950 CABLEVISION LIGHTPATH, INC. - CT 920   2015-06-26   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.