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.

OCN: 4800 LEVEL 3 COMMUNICATIONS, LLC - CT

<< 1 2 3 4 5 6 7 8 9 10 11 12 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
203-883 4 Stamford CT   920   2010-07-28   
203-883 5 Stamford CT   920   2013-01-05   
203-883 6 Stamford CT   920   2010-07-28   
203-883 9 Stamford CT   920      
203-885 1 Danbury CT   920   2007-07-03   
203-889 A New Haven CT   920      
203-889 0 New Haven CT   920      
203-889 4 New Haven CT   920      
203-889 5 New Haven CT   920      
203-889 9 New Haven CT   920      
203-900 2 Greenwich CT   132   2013-01-05   
203-900 3 Greenwich CT   132   2014-10-27   
203-901 1 New Haven CT   920   2007-11-02   
203-903 A New Haven CT SMFRCTPU4MD  920      
203-903 0 New Haven CT   920      
203-903 9 New Haven CT   920   2009-04-27   
203-904 2 Norwalk CT   920   2012-11-15   
203-909 6 New Haven CT   920   2008-07-25   
203-916 A Bridgeport CT SMFRCTPU4MD  920      
203-916 0 Bridgeport CT   920   2010-03-28   
203-916 1 Bridgeport CT   920      
203-916 4 Bridgeport CT   920   2010-11-25   
203-916 5 Bridgeport CT   920   2010-07-23   
203-916 6 Bridgeport CT   920   2011-01-31   
203-920 4 New Canaan CT   920   2004-04-13   
203-930 A Greenwich CT   132   2025-04-25   
203-930 1 Greenwich CT   132   2010-05-07   
203-930 2 Greenwich CT   132      
203-930 3 Greenwich CT   132      
203-935 A Meriden CT   920   2025-04-26   
203-935 2 Meriden CT   920      
203-936 6 New Haven CT   920   2010-07-02   
203-941 2 Seymour CT   920   2012-03-03   
203-951 0 Milford CT   920   2007-04-19   
203-951 3 Milford CT   920   2005-08-05   
203-951 5 Milford CT   920   2010-11-18   
203-951 6 Milford CT   920   2004-12-12   
203-951 8 Milford CT   920   2012-06-23   
203-953 0 Bridgeport CT   920   2005-11-03   
203-987 A Greenwich CT NYCMNY83DSZ  132      
203-987 3 Greenwich CT   132   2005-05-01   
203-987 4 Greenwich CT   132      
203-987 5 Greenwich CT   132   2004-08-09   
203-987 6 Greenwich CT   132   2005-05-01   
203-989 A Stamford CT SMFRCTPU4MD  920      
203-989 0 Stamford CT   920      
203-989 2 Stamford CT   920   2011-02-26   
203-989 3 Stamford CT   920   2012-07-29   
203-989 4 Stamford CT   920   2012-02-17   
203-993 8 Bridgeport CT   920   2007-05-04   

<< 1 2 3 4 5 6 7 8 9 10 11 12 >>

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.