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: 203 [Rate centres in NPA 203] [Dial plan for NPA 203]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-350 A Madison CT HRFRCTCRDS0  7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-350 0 Madison CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2008-05-13   
203-350 1 Madison CT   7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-350 2 Madison CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2010-02-26   
203-350 3 Madison CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2010-07-03   
203-350 4 Madison CT   7575 CENTURYLINK COMMUNICATIONS LLC 920   2014-04-11   
203-350 5 Madison CT   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2007-09-07   
203-350 6 Madison CT   639C ONVOY, LLC - CT 920   2019-08-09   
203-350 7 Madison CT   7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-350 8 Madison CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2014-06-30   
203-350 9 Madison CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2008-11-29   

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.