Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
203-774 4 Wallingford CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2003-08-12   
203-774 5 Wallingford CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2011-08-27   
203-779 6 Madison CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2011-05-26   
203-779 7 Madison CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2012-06-23   
203-793 A Wallingford CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-793 2 Wallingford CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-793 3 Wallingford CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-794 7 Danbury CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2011-08-11   
203-802 3 Waterbury CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2014-10-27   
203-802 6 Waterbury CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2011-09-08   
203-803 1 Norwalk CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2005-02-07   
203-803 2 Norwalk CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2005-01-17   
203-803 4 Norwalk CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2003-03-23   
203-806 4 Cheshire CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2008-05-20   
203-815 1 New Haven CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2010-04-11   
203-816 A Trumbull CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2025-04-26   
203-816 2 Trumbull CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-816 3 Trumbull CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-816 4 Trumbull CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-816 6 Trumbull CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2003-09-22   
203-816 8 Trumbull CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2002-07-16   
203-819 7 Waterbury CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2012-03-03   
203-826 2 Danbury CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2010-11-18   
203-826 8 Danbury CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2005-09-10   
203-828 A Seymour CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2025-04-26   
203-828 1 Seymour CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2008-09-16   
203-828 2 Seymour CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-828 3 Seymour CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-828 4 Seymour CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-828 5 Seymour CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-842 A Norwalk CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-842 0 Norwalk CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2002-08-20   
203-842 2 Norwalk CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-842 3 Norwalk CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-842 4 Norwalk CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-842 5 Norwalk CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-844 0 Fairfield CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2004-12-16   
203-871 3 Branford CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2004-12-11   
203-883 A Stamford CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-883 0 Stamford CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2009-11-07   
203-883 1 Stamford CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2010-01-31   
203-883 4 Stamford CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2010-07-28   
203-883 5 Stamford CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2013-01-05   
203-883 6 Stamford CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2010-07-28   
203-883 9 Stamford CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-885 1 Danbury CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2007-07-03   
203-889 A New Haven CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-889 0 New Haven CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-889 4 New Haven CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-889 5 New Haven CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      

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Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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