Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Old Greenwich, CT

1 2 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
203-277 A SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-277 0 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-06-01   
203-277 1 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-06-01   
203-277 2 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-06-01   
203-277 3 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-06-01   
203-277 4 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-06-01   
203-277 5 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-06-01   
203-277 6 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-06-01   
203-277 7 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-06-01   
203-277 8 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-06-01   
203-277 9 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-06-01   
203-344 A NRWLCT02YMD  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-344 0 HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2010-10-15   
203-344 1 NRWLCT02YMD  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-344 2 NWHNCT02GT0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2007-03-01   
203-344 3 NRWLCT02YMD  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-344 4   145J TERRA NOVA TELECOM INC. 920   2022-10-18   
203-344 5 HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2010-07-03   
203-344 6 NRWLCT02YMD  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-344 7 HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2013-04-29   
203-344 8 HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2012-10-22   
203-344 9 NRWLCT02YMD  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-369 A SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-369 0 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-11-28   
203-369 1 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-11-28   
203-369 2 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-11-28   
203-369 3 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-12-19   
203-369 4 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-12-19   
203-369 5 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-12-19   
203-369 6 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-12-19   
203-369 7 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-12-20   
203-369 8 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-12-20   
203-369 9 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-12-20   
203-409 A HRFRCTCRDS0  7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-409 0   829J PAETEC ITEL, LLC 920   2005-11-25   
203-409 1 HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2012-10-22   
203-409 2 HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2015-05-24   
203-409 3   829J PAETEC ITEL, LLC 920   2001-09-03   
203-409 4 HRFRCTCRDS0  7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT 920      
203-409 5 HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2014-02-10   
203-409 6   829J PAETEC ITEL, LLC 920   2004-06-18   
203-409 7 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2003-09-07   
203-409 8 HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2012-10-22   
203-637 A OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-698 A OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-698 0 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-698 1 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-698 2 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-698 3 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-698 4 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-698 5 SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2012-07-26   
203-698 6   829J PAETEC ITEL, LLC 920   2006-12-04   
203-698 7 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-698 8 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-698 9 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-827 A SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-827 0 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2005-02-04   
203-827 1 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2005-02-04   
203-827 2 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2005-02-04   
203-827 3 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2005-02-04   
203-827 4 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2005-02-04   
203-827 5 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2005-02-04   
203-827 6 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2005-02-04   
203-827 7 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-09-19   
203-827 8 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-09-19   
203-827 9 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-09-19   
203-986 A SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-986 0 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-08-02   
203-986 1 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-08-02   
203-986 2 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-08-02   
203-986 3 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-08-02   
203-986 4 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-08-02   
203-986 5 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-04-12   
203-986 6 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-04-12   
203-986 7 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-04-12   
203-986 8 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-04-12   
203-986 9 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-04-12   
203-990 A SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-990 0 NRWLCT028MD  4950 CABLEVISION LIGHTPATH, INC. - CT 920   2007-11-16   
203-990 1 HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2012-10-22   
203-990 2 NWLNCTCS6MD  508J CENTURYLINK COMMUNICATIONS, LLC 920   2014-07-08   
203-990 3 NRWLCT028MD  4950 CABLEVISION LIGHTPATH, INC. - CT 920   2013-09-14   
203-990 4 HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2012-10-22   
203-990 5 HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2013-04-29   
203-990 6 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2007-02-22   
203-990 7 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2005-03-24   
203-990 8 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2005-03-24   
203-990 9 SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2005-03-24   
475-249 A OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
475-249 0 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2014-08-21   
475-249 1 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2014-08-21   
475-249 2 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2014-08-21   
475-249 3 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2014-08-21   
475-249 4 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2014-08-21   
475-249 5 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2014-08-21   
475-249 6 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2014-08-21   
475-249 7 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2014-08-21   
475-249 8 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2014-08-21   
475-249 9 OGNWCT00RS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2014-08-21   
475-340 A HRFRCTBCDS1  639C ONVOY, LLC - CT 920      

1 2 >>

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.