Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 203 [Rate centres in NPA 203] [Dial plan for NPA 203]

NXX: 717

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-717 A Greenwich CT   612K CSC VOICE, LLC 132      
203-717 0 Greenwich CT   539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 132   2012-09-15   
203-717 1 Greenwich CT   612K CSC VOICE, LLC 132   2011-03-28   
203-717 2 Greenwich CT   350E YMAX COMMUNICATIONS CORP. - CT 132   2011-07-11   
203-717 3 Greenwich CT   350E YMAX COMMUNICATIONS CORP. - CT 132   2011-07-11   
203-717 4 Greenwich CT   639C ONVOY, LLC - CT 132   2016-10-31   
203-717 5 Greenwich CT   639C ONVOY, LLC - CT 132   2018-04-02   
203-717 6 Greenwich CT   829J PAETEC ITEL, LLC 132   2012-09-03   
203-717 7 Greenwich CT   639C ONVOY, LLC - CT 132   2013-11-03   
203-717 8 Greenwich CT   350E YMAX COMMUNICATIONS CORP. - CT 132   2011-04-28   
203-717 9 Greenwich CT   639C ONVOY, LLC - CT 132   2018-03-08   

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

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