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.

Stamford, CT

<< 1 2 3 4 5 6 7 8 9 10 11 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
203-348 A SMFRCT01DS2  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-351 A SMFRCT01DS2  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-352 A SMFRCT01DS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-353 A SMFRCT01DS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-355 A NRWLCT02YMD  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-356 A SMFRCT01DS2  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-356 0   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-356 1   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-356 2   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-356 3   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-356 4   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-356 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2014-10-01   
203-356 6   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-356 7   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-356 8   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-356 9   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-357 A SMFRCT01DS2  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-357 0   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-357 1   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-357 2   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-357 3   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-357 4   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-357 5   199F BANDWIDTH.COM CLEC, LLC - CT 920   2014-02-08   
203-357 6   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-357 7   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-357 8   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-357 9   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-358 A SMFRCT01DS2  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-358 0   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-358 1   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-358 2   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-358 3   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-358 4   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-358 5   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-358 6   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-358 7   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2006-01-08   
203-358 8   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-358 9   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-359 A SMFRCT01DS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-363 A SMFRCT01DS2  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-363 0   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-363 1   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-363 2   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-363 3   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-363 4   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2006-05-18   
203-363 5   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-363 6   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-363 7   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-363 8   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-363 9   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-388 A SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-388 0   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-388 1   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-388 2   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-388 3   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-388 4   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-388 5   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2014-09-06   
203-388 6   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2014-09-06   
203-388 7   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-388 8   612K CSC VOICE, LLC 920   2008-04-11   
203-388 9   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-391 A SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-391 0   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-391 1   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2005-06-23   
203-391 2   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-391 3   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2015-01-01   
203-391 4   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2007-03-24   
203-391 5   829J PAETEC ITEL, LLC 920   2005-11-08   
203-391 6   829J PAETEC ITEL, LLC 920   2006-06-25   
203-391 7   829J PAETEC ITEL, LLC 920   2007-07-10   
203-391 8   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2006-01-21   
203-391 9   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-399 A SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-399 0   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-399 1   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-399 2   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-11-15   
203-399 3   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-11-15   
203-399 4   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-11-15   
203-399 5   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-399 6   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-11-15   
203-399 7   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-11-15   
203-399 8   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-11-15   
203-399 9   829J PAETEC ITEL, LLC 920   2014-10-16   
203-406 A SMFRCT01DS1  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-406 0   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-406 1   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-406 2   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-406 3   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-406 4   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-406 5   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-406 6   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-406 7   612K CSC VOICE, LLC 920   2010-07-23   
203-406 8   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-406 9   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-425 A SMFRCT01DS2  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-428 A SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-428 0   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-428 1   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2005-08-13   
203-428 2   4950 CABLEVISION LIGHTPATH, INC. - CT 920   2002-06-18   
203-428 3   7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      

<< 1 2 3 4 5 6 7 8 9 10 11 >>

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.