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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
203-437 6 Waterbury CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2005-02-19   
203-437 7 Waterbury CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2004-10-27   
203-437 8 Waterbury CT   318J COMCAST IP PHONE, LLC 920   2009-08-31   
203-437 9 Waterbury CT   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 920      
203-438 A Ridgefield CT RDFDCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-439 A Cheshire CT HRFRCTCR3MD  318J COMCAST IP PHONE, LLC 920      
203-439 0 Cheshire CT   318J COMCAST IP PHONE, LLC 920      
203-439 1 Cheshire CT   5562 METROPCS, INC. 920   2006-09-26   
203-439 2 Cheshire CT   318J COMCAST IP PHONE, LLC 920   2006-09-19   
203-439 3 Cheshire CT   639C ONVOY, LLC - CT 920   2016-08-11   
203-439 4 Cheshire CT   639C ONVOY, LLC - CT 920   2016-08-11   
203-439 5 Cheshire CT   639C ONVOY, LLC - CT 920   2017-09-29   
203-439 6 Cheshire CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2016-07-14   
203-439 7 Cheshire CT   318J COMCAST IP PHONE, LLC 920      
203-439 8 Cheshire CT   318J COMCAST IP PHONE, LLC 920   2014-10-10   
203-439 9 Cheshire CT   318J COMCAST IP PHONE, LLC 920      
203-440 A Meriden CT HRFRCTCR3MD  318J COMCAST IP PHONE, LLC 920      
203-440 0 Meriden CT   318J COMCAST IP PHONE, LLC 920      
203-440 1 Meriden CT   318J COMCAST IP PHONE, LLC 920      
203-440 2 Meriden CT   318J COMCAST IP PHONE, LLC 920      
203-440 3 Meriden CT   318J COMCAST IP PHONE, LLC 920      
203-440 4 Meriden CT   318J COMCAST IP PHONE, LLC 920      
203-440 5 Meriden CT   5562 METROPCS, INC. 920   2013-07-08   
203-440 6 Meriden CT   5562 METROPCS, INC. 920   2013-11-03   
203-440 7 Meriden CT   5562 METROPCS, INC. 920   2013-11-03   
203-440 8 Meriden CT   5562 METROPCS, INC. 920   2014-03-14   
203-440 9 Meriden CT   318J COMCAST IP PHONE, LLC 920   2005-06-11   
203-441 A Wolcott CT HRFRCTCRDS0  7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-441 0 Wolcott CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2008-11-29   
203-441 1 Wolcott CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2015-05-11   
203-441 2 Wolcott CT   145J TERRA NOVA TELECOM INC. 920   2022-10-07   
203-441 3 Wolcott CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2010-02-28   
203-441 4 Wolcott CT   318J COMCAST IP PHONE, LLC 920   2006-11-22   
203-441 5 Wolcott CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2011-01-13   
203-441 6 Wolcott CT   318J COMCAST IP PHONE, LLC 920   2014-03-31   
203-441 7 Wolcott CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2012-07-05   
203-441 8 Wolcott CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2005-09-22   
203-441 9 Wolcott CT   7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-442 A New Canaan CT HRFRCTCRDS0  7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-442 0 New Canaan CT   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-09-30   
203-442 1 New Canaan CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2011-12-11   
203-442 2 New Canaan CT   7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-442 3 New Canaan CT   5562 METROPCS, INC. 920   2003-08-03   
203-442 4 New Canaan CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2014-11-28   
203-442 5 New Canaan CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2010-02-28   
203-442 6 New Canaan CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2013-09-06   
203-442 7 New Canaan CT   145J TERRA NOVA TELECOM INC. 920   2022-10-08   
203-442 8 New Canaan CT   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-01-05   
203-442 9 New Canaan CT   539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2013-05-03   
203-443 A Meriden CT HRFRCTASDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 920      
203-443 0 Meriden CT   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2011-02-10   
203-443 1 Meriden CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2012-11-12   
203-443 2 Meriden CT   5562 METROPCS, INC. 920   2011-03-25   
203-443 3 Meriden CT   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2010-10-25   
203-443 4 Meriden CT   5562 METROPCS, INC. 920   2011-02-17   
203-443 5 Meriden CT   318J COMCAST IP PHONE, LLC 920   2007-09-11   
203-443 6 Meriden CT   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2015-12-24   
203-443 7 Meriden CT   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2008-06-21   
203-443 8 Meriden CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2011-06-01   
203-443 9 Meriden CT   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2014-12-11   
203-444 A New Haven CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920      
203-445 A Trumbull CT TMBLCT00DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-445 0 Trumbull CT   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-445 1 Trumbull CT   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-445 2 Trumbull CT   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-445 3 Trumbull CT   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2007-12-27   
203-445 4 Trumbull CT   829J PAETEC ITEL, LLC 920   2006-10-24   
203-445 5 Trumbull CT   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-445 6 Trumbull CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2005-03-17   
203-445 7 Trumbull CT   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-445 8 Trumbull CT   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-445 9 Trumbull CT   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-446 A Ansonia-Derby CT HRFRCTCRDS0  7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-446 0 Ansonia-Derby CT   7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-446 1 Ansonia-Derby CT   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2006-12-10   
203-446 2 Ansonia-Derby CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2004-12-28   
203-446 3 Ansonia-Derby CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2004-12-28   
203-446 4 Ansonia-Derby CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2003-08-12   
203-446 5 Ansonia-Derby CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2005-02-04   
203-446 6 Ansonia-Derby CT   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2010-06-08   
203-446 7 Ansonia-Derby CT   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2007-10-22   
203-446 8 Ansonia-Derby CT   4950 CABLEVISION LIGHTPATH, INC. - CT 920   2001-09-05   
203-446 9 Ansonia-Derby CT   829J PAETEC ITEL, LLC 920   2002-01-29   
203-447 A Huntington CT HRFRCTCRDS0  7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-447 0 Huntington CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2015-05-16   
203-447 1 Huntington CT   7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-447 2 Huntington CT   7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-447 3 Huntington CT   7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-447 4 Huntington CT   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 920   2014-10-14   
203-447 5 Huntington CT   7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-447 6 Huntington CT   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 920   2015-01-12   
203-447 7 Huntington CT   7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-447 8 Huntington CT   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 920   2003-06-18   
203-447 9 Huntington CT   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2014-05-17   
203-448 A Danbury CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-448 0 Danbury CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2006-02-04   
203-448 1 Danbury CT   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-448 2 Danbury CT   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-448 3 Danbury CT   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-448 4 Danbury CT   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      

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

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