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: 446

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-446 A Ansonia-Derby CT HRFRCTCRDS0  7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-446 0 Ansonia-Derby CT HRFRCTCRDS0  7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-446 1 Ansonia-Derby CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2006-12-10   
203-446 2 Ansonia-Derby CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2004-12-28   
203-446 3 Ansonia-Derby CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2004-12-28   
203-446 4 Ansonia-Derby CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2003-08-12   
203-446 5 Ansonia-Derby CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2005-02-04   
203-446 6 Ansonia-Derby CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2010-06-08   
203-446 7 Ansonia-Derby CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2007-10-22   
203-446 8 Ansonia-Derby CT NRWLCTCVDS0  4950 CABLEVISION LIGHTPATH, INC. - CT 920   2001-09-05   
203-446 9 Ansonia-Derby CT SMFRCTATXMD  3083 PAETEC COMMUNICATIONS, LLC - CT 920   2002-01-29   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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