Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
475-328 9 Darien CT NRWLCT02SMD  920   2014-08-22   
475-330 A Fairfield CT NRWLCT022MD  920      
475-330 1 Fairfield CT NRWLCT022MD  920   2015-08-01   
475-396 A Bridgeport CT HRFRCTBCBMD  920   2025-10-02   
475-396 4 Bridgeport CT HRFRCTBCBMD  920   2025-10-02   
475-422 9 Bridgeport CT NRWLCT02SMD  920   2013-04-15   
475-449 9 Bridgeport CT NRWLCT02SMD  920   2014-12-20   
475-549 8 Milford CT NRWLCT02SMD  920   2015-06-22   
475-558 9 New Canaan CT NRWLCT02SMD  920   2015-06-26   
475-619 5 Stamford CT NRWLCT02SMD  920   2015-07-25   
475-619 9 Stamford CT NRWLCT02SMD  920   2015-04-03   
475-888 9 Fairfield CT NRWLCT02SMD  920   2015-06-13   
475-897 A Greenwich CT GNWCCTGN2MD  132      
475-897 1 Greenwich CT GNWCCTGN2MD  132   2015-08-06   
475-999 8 Fairfield CT NRWLCT02SMD  920   2013-07-06   
479-219 A Russellville AR   528      
479-307 A Atkins AR   528      
479-315 A Dover AR   528      
479-538 A Charleston AR FTSMAR08BMD  526      
479-538 5 Charleston AR   526   2024-05-12   
479-666 0 Waldron AR   526   2024-05-12   
479-703 A Lamar AR   528      
479-733 A Lamar AR   528      
501-226 A Jessieville AR   528      
512-202 3 Austin TX   558   2012-03-26   
512-240 4 Georgetown TX   558   2006-11-08   
512-240 5 Georgetown TX   558   2007-06-12   
512-528 4 Leander TX   558   2014-02-28   
512-591 7 Georgetown TX   558   2008-11-10   
512-598 A Jarrell TX AUSTTXHOX3X  558      
512-598 3 Jarrell TX   558   2014-04-04   
512-642 4 Hutto TX   558   2007-07-06   
512-688 A Georgetown TX AUSTTXHOX3X  558      
512-688 1 Georgetown TX   558   2013-12-30   
512-688 2 Georgetown TX   558   2013-12-30   
512-688 3 Georgetown TX   558   2013-12-30   
512-688 4 Georgetown TX   558   2013-12-30   
512-688 5 Georgetown TX   558   2013-12-30   
512-721 5 Austin TX   558   2006-08-23   
512-746 6 Jarrell TX   558   2010-10-15   
512-819 1 Georgetown TX   558   2014-03-17   
512-819 6 Georgetown TX   558   2014-03-17   
512-846 0 Hutto TX   558   2014-02-28   
512-852 1 Austin TX   558   2007-04-05   
512-943 0 Georgetown PPCP TX   558   2011-08-01   
512-943 4 Georgetown PPCP TX   558   2011-08-01   
512-943 8 Georgetown PPCP TX   558   2011-08-01   
512-943 9 Georgetown PPCP TX   558   2009-09-16   
512-948 7 Georgetown PPCP TX   558   2010-09-18   
512-969 A Austin TX AUSTTXHOX3X  558      

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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