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: 220

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-220 A Trumbull CT NRWLCT02YMD  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-220 0 Trumbull CT   4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-220 1 Trumbull CT   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2022-02-10   
203-220 2 Trumbull CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2005-11-03   
203-220 3 Trumbull CT   624H ONVOY SPECTRUM, LLC 920   2022-01-07   
203-220 4 Trumbull CT   4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-220 5 Trumbull CT   612K CSC VOICE, LLC 920      
203-220 6 Trumbull CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2008-05-22   
203-220 7 Trumbull CT   4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-220 8 Trumbull CT   792K CHARTER IP ENABLED SERVICES, LLC 920   2005-01-17   
203-220 9 Trumbull CT   612K CSC VOICE, LLC 920      

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

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