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: 243

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-243 A Ansonia-Derby CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920      
475-243 0 Ansonia-Derby CT   539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2013-04-29   
475-243 1 Ansonia-Derby CT   539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2013-04-29   
475-243 2 Ansonia-Derby CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2013-09-06   
475-243 3 Ansonia-Derby CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-08-12   
475-243 4 Ansonia-Derby CT   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2014-06-13   
475-243 5 Ansonia-Derby CT   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2014-05-17   
475-243 6 Ansonia-Derby CT   6624 OMNIPOINT COMMUNICATIONS, INC. - CT DBA T-MOBILE USA 920   2013-10-23   
475-243 7 Ansonia-Derby CT   539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2013-04-01   
475-243 8 Ansonia-Derby CT   6624 OMNIPOINT COMMUNICATIONS, INC. - CT DBA T-MOBILE USA 920   2013-08-31   
475-243 9 Ansonia-Derby CT   6624 OMNIPOINT COMMUNICATIONS, INC. - CT DBA T-MOBILE USA 920   2014-07-09   

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.