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: 971

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-971 A Greenwich CT GNWCCTGNX5Y  4950 CABLEVISION LIGHTPATH, INC. - CT 132      
203-971 0 Greenwich CT   639C ONVOY, LLC - CT 132   2021-07-03   
203-971 1 Greenwich CT   639C ONVOY, LLC - CT 132   2021-07-03   
203-971 2 Greenwich CT   639C ONVOY, LLC - CT 132   2021-07-03   
203-971 3 Greenwich CT   4950 CABLEVISION LIGHTPATH, INC. - CT 132      
203-971 4 Greenwich CT   866H BARR TEL USA, INC. - CT 132   2021-09-09   
203-971 5 Greenwich CT   639C ONVOY, LLC - CT 132   2021-07-03   
203-971 6 Greenwich CT   639C ONVOY, LLC - CT 132   2022-09-17   
203-971 7 Greenwich CT   9104 VERIZON NEW YORK, INC. 132   2007-04-24   
203-971 8 Greenwich CT   350E YMAX COMMUNICATIONS CORP. - CT 132   2008-06-01   
203-971 9 Greenwich CT   350E YMAX COMMUNICATIONS CORP. - CT 132   2008-04-21   

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

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