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
203-456 A Danbury CT WLFRCTAICM5  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2012-02-03   
203-456 0 Danbury CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2012-12-23   
203-456 1 Danbury CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2012-04-20   
203-456 2 Danbury CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2012-02-06   
203-456 3 Danbury CT   7621 COMCAST PHONE OF CONNECTICUT, INC. - CT 920   2013-01-05   
203-456 4 Danbury CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2012-06-21   
203-456 5 Danbury CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2012-06-21   
203-456 6 Danbury CT   7621 COMCAST PHONE OF CONNECTICUT, INC. - CT 920   2014-02-09   
203-456 7 Danbury CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2013-07-26   
203-456 8 Danbury CT   539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2013-05-03   
203-456 9 Danbury CT   539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2013-05-03   

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.