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: 633

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-633 A Wolcott CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-633 0 Wolcott CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2005-02-04   
203-633 1 Wolcott CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2005-02-14   
203-633 2 Wolcott CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2014-10-30   
203-633 3 Wolcott CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2014-02-08   
203-633 4 Wolcott CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-633 5 Wolcott CT HRFRCT03GT0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2011-04-26   
203-633 6 Wolcott CT NWHNCT030MD  3722 CONVERSENT COMMUNICATIONS OF CONNECTICUT, LLC - CT 920   2005-11-20   
203-633 7 Wolcott CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2013-05-04   
203-633 8 Wolcott CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2013-05-04   
203-633 9 Wolcott CT NWHNCT02XJX  624H ONVOY SPECTRUM, LLC 920   2021-11-08   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.