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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
203-812 A New Haven CT NWHNCT03DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-812 0 New Haven CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2006-05-16   
203-812 1 New Haven CT NWHNCT03DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-812 2 New Haven CT NWHNCT03DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-812 3 New Haven CT NWHNCT03DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-812 4 New Haven CT NWHNCT03DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-812 5 New Haven CT NWHNCT03DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-812 6 New Haven CT NWHNCT03DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-812 7 New Haven CT NWHNCT03DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-812 8 New Haven CT BLFDCTAP2MD  6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2005-10-30   
203-812 9 New Haven CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2006-05-16   
203-813 A Byram CT WHPLNY02DS5  7140 TC SYSTEMS, INC. - NY 132      
203-813 0 Byram CT NYCMNY83D1S  350E YMAX COMMUNICATIONS CORP. - CT 132   2009-09-15   
203-813 1 Byram CT NYCMNY83D1S  350E YMAX COMMUNICATIONS CORP. - CT 132   2009-02-06   
203-813 2 Byram CT NYCMNY83D1S  350E YMAX COMMUNICATIONS CORP. - CT 132   2009-09-15   
203-813 3 Byram CT   612K CSC VOICE, LLC 132   2005-04-22   
203-813 4 Byram CT NYCMNYBXDSL  639C ONVOY, LLC - CT 132   2019-02-18   
203-813 5 Byram CT NYCMNYBXDSL  639C ONVOY, LLC - CT 132   2016-04-24   
203-813 6 Byram CT NYCMNY83D1S  350E YMAX COMMUNICATIONS CORP. - CT 132   2008-10-10   
203-813 7 Byram CT NYCMNY83D1S  350E YMAX COMMUNICATIONS CORP. - CT 132   2008-06-18   
203-813 8 Byram CT NYCMNY83D1S  350E YMAX COMMUNICATIONS CORP. - CT 132   2008-06-18   
203-813 9 Byram CT WHPLNY02DS5  7140 TC SYSTEMS, INC. - NY 132      
203-814 A Bridgeport CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920      
203-814 0 Bridgeport CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2006-03-08   
203-814 1 Bridgeport CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2011-05-27   
203-814 2 Bridgeport CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2006-05-04   
203-814 3 Bridgeport CT   829J PAETEC ITEL, LLC 920   2006-05-20   
203-814 4 Bridgeport CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2006-01-09   
203-814 5 Bridgeport CT BLFDCTAP2MD  6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2005-10-30   
203-814 6 Bridgeport CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2006-02-04   
203-814 7 Bridgeport CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2006-02-04   
203-814 8 Bridgeport CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2005-10-03   
203-814 9 Bridgeport CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2009-04-06   
203-815 A New Haven CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920      
203-815 0 New Haven CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2006-08-03   
203-815 1 New Haven CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2010-04-11   
203-815 2 New Haven CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2006-07-02   
203-815 3 New Haven CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2006-02-04   
203-815 4 New Haven CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2006-02-04   
203-815 5 New Haven CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2005-09-04   
203-815 6 New Haven CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2006-04-03   
203-815 7 New Haven CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2006-04-03   
203-815 8 New Haven CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2005-12-02   
203-815 9 New Haven CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2006-04-03   
203-816 A Trumbull CT   4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2025-04-26   
203-816 0 Trumbull CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2008-11-29   
203-816 1 Trumbull CT BLFDCTAP2MD  6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2004-07-13   
203-816 2 Trumbull CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-816 3 Trumbull CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-816 4 Trumbull CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-816 5 Trumbull CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2010-02-28   
203-816 6 Trumbull CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2003-09-22   
203-816 7 Trumbull CT BLFDCTAP2MD  6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2002-12-11   
203-816 8 Trumbull CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2002-07-16   
203-816 9 Trumbull CT   145J TERRA NOVA TELECOM INC. 920   2025-04-28   
203-817 A Stamford CT NRWLCT02YMD  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-817 0 Stamford CT   612K CSC VOICE, LLC 920   2011-12-05   
203-817 1 Stamford CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-01-17   
203-817 2 Stamford CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-01-17   
203-817 3 Stamford CT NRWLCTCVDS0  4950 CABLEVISION LIGHTPATH, INC. - CT 920   2007-02-22   
203-817 4 Stamford CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-01-17   
203-817 5 Stamford CT NRWLCTCVDS0  4950 CABLEVISION LIGHTPATH, INC. - CT 920   2012-08-27   
203-817 6 Stamford CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2014-12-05   
203-817 7 Stamford CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-07-25   
203-817 8 Stamford CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-07-25   
203-817 9 Stamford CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-07-25   
203-818 A Norwalk CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-818 0 Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920   2014-05-26   
203-818 1 Norwalk CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2014-04-01   
203-818 2 Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920   2013-01-22   
203-818 3 Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920   2011-05-19   
203-818 4 Norwalk CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-12-15   
203-818 5 Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920   2011-05-19   
203-818 6 Norwalk CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-12-15   
203-818 7 Norwalk CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-12-15   
203-818 8 Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920   2011-02-25   
203-818 9 Norwalk CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2014-04-01   
203-819 A Waterbury CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920      
203-819 0 Waterbury CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2010-05-16   
203-819 1 Waterbury CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2010-05-16   
203-819 2 Waterbury CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2010-05-07   
203-819 3 Waterbury CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2009-04-10   
203-819 4 Waterbury CT BLFDCTAP2MD  5562 METROPCS, INC. 920   2011-11-21   
203-819 5 Waterbury CT BLFDCTAP2MD  6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2006-08-21   
203-819 6 Waterbury CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2010-09-09   
203-819 7 Waterbury CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2012-03-03   
203-819 8 Waterbury CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2010-07-31   
203-819 9 Waterbury CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2012-07-01   
203-820 A Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920      
203-820 0 Norwalk CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2014-10-12   
203-820 1 Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920      
203-820 2 Norwalk CT HRFRCT0377Z  350E YMAX COMMUNICATIONS CORP. - CT 920   2011-10-12   
203-820 3 Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920      
203-820 4 Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920      
203-820 5 Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920      
203-820 6 Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920      
203-820 7 Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920      
203-820 8 Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920      
203-820 9 Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920      
203-821 A New Haven CT NWHNCT03DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      

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Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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