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NPA: 203 [Rate centres in NPA 203] [Dial plan for NPA 203]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-401 0 New Haven CT NWHNCT03DS3  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-401 1 New Haven CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2003-03-16   
203-401 2 New Haven CT NWHNCT03DS3  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-401 3 New Haven CT NWHNCT03DS3  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-401 4 New Haven CT NWHNCT03DS3  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-401 5 New Haven CT NWHNCT03DS3  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-401 6 New Haven CT NWHNCT03DS3  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-401 7 New Haven CT NWHNCT03DS3  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-401 8 New Haven CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2002-07-16   
203-401 9 New Haven CT BLFDCTAP2MD  6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2005-09-05   
203-402 A Huntington CT HNTNCT00DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-402 0 Huntington CT HNTNCT00DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-402 1 Huntington CT HNTNCT00DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-402 2 Huntington CT   829J PAETEC ITEL, LLC 920   2008-03-26   
203-402 3 Huntington CT HNTNCT00DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-402 4 Huntington CT HNTNCT00DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-402 5 Huntington CT HNTNCT00DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-402 6 Huntington CT HNTNCT00DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-402 7 Huntington CT HNTNCT00DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-402 8 Huntington CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2010-09-09   
203-402 9 Huntington CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2011-06-15   
203-403 A Ridgefield CT HRFRCTCRDS0  7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-403 0 Ridgefield CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2014-04-19   
203-403 1 Ridgefield CT HRFRCTCRDS0  7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-403 2 Ridgefield CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2008-05-13   
203-403 3 Ridgefield CT HRFRCTCR3MD  318J COMCAST IP PHONE, LLC 920   2008-12-13   
203-403 4 Ridgefield CT   829J PAETEC ITEL, LLC 920   2004-09-28   
203-403 5 Ridgefield CT NWHNCT02GT0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2007-09-07   
203-403 6 Ridgefield CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2011-02-26   
203-403 7 Ridgefield CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2012-06-08   
203-403 8 Ridgefield CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2013-11-02   
203-403 9 Ridgefield CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2001-05-07   
203-404 A New Haven CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-404 0 New Haven CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-404 1 New Haven CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-404 2 New Haven CT NWHNCT02XJX  624H ONVOY SPECTRUM, LLC 920   2022-01-08   
203-404 3 New Haven CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2005-01-09   
203-404 4 New Haven CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2004-07-22   
203-404 5 New Haven CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2006-04-07   
203-404 6 New Haven CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2006-09-23   
203-404 7 New Haven CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2004-12-03   
203-404 8 New Haven CT NWHNCT02XJX  624H ONVOY SPECTRUM, LLC 920   2022-07-06   
203-404 9 New Haven CT   515J IP HORIZON LLC 920   2022-07-08   
203-405 A Woodbury CT   829J PAETEC ITEL, LLC 920      
203-405 0 Woodbury CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2011-05-19   
203-405 1 Woodbury CT WLMNCT132MD  792K CHARTER IP ENABLED SERVICES, LLC 920   2005-09-22   
203-405 2 Woodbury CT   829J PAETEC ITEL, LLC 920   2001-05-26   
203-405 3 Woodbury CT WLMNCT132MD  792K CHARTER IP ENABLED SERVICES, LLC 920   2007-10-11   
203-405 4 Woodbury CT HRFRCTASDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 920   2009-01-02   
203-405 5 Woodbury CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2010-07-03   

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Last updated: Sun, 17 May 2026 03:26:51 UTC

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