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: 897

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-897 A Greenwich CT   612K CSC VOICE, LLC 132      
475-897 0 Greenwich CT   866H BARR TEL USA, INC. - CT 132   2016-07-18   
475-897 1 Greenwich CT   612K CSC VOICE, LLC 132   2015-08-06   
475-897 2 Greenwich CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 132   2015-09-26   
475-897 3 Greenwich CT   539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 132   2017-07-08   
475-897 4 Greenwich CT   7140 TC SYSTEMS, INC. - NY 132   2018-07-20   
475-897 5 Greenwich CT   639C ONVOY, LLC - CT 132   2018-09-02   
475-897 6 Greenwich CT   073H TELNYX LLC 132   2019-05-22   
475-897 7 Greenwich CT   639C ONVOY, LLC - CT 132   2016-03-11   
475-897 8 Greenwich CT   199F BANDWIDTH.COM CLEC, LLC - CT 132   2016-08-15   
475-897 9 Greenwich CT   639C ONVOY, LLC - CT 132   2016-03-11   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.