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: 612K CSC VOICE, LLC

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
201-962 3 Ramsey NJ PRNYNJFP6MD  224      
201-962 7 Ramsey NJ PRNYNJFP6MD  224      
201-962 8 Ramsey NJ PRNYNJFP6MD  224      
201-968 5 Hackensack NJ PRNYNJFP6MD  224   2008-04-11   
203-202 7 Darien CT NRWLCT02SMD  920      
203-202 9 Darien CT NRWLCT02SMD  920      
203-210 5 Wilton CT NRWLCT02SMD  920      
203-210 7 Wilton CT NRWLCT02SMD  920      
203-212 3 Bridgeport CT NRWLCT02SMD  920   2010-07-23   
203-220 5 Trumbull CT NRWLCT02SMD  920      
203-220 9 Trumbull CT NRWLCT02SMD  920      
203-228 5 Waterbury CT NRWLCT02SMD  920   2003-07-14   
203-244 A Ridgefield CT NRWLCT02SMD  920      
203-244 3 Ridgefield CT NRWLCT02SMD  920   2003-05-19   
203-274 5 Stamford CT NRWLCT02SMD  920   2003-07-01   
203-274 6 Stamford CT NRWLCT02SMD  920   2004-03-01   
203-274 7 Stamford CT NRWLCT02SMD  920   2007-08-10   
203-275 8 Bridgeport CT NRWLCT02SMD  920   2008-04-11   
203-276 0 Stamford CT NRWLCT02SMD  920   2003-05-19   
203-276 1 Stamford CT NRWLCT02SMD  920   2003-05-19   
203-276 9 Stamford CT NRWLCT02SMD  920   2003-05-19   
203-283 1 Milford CT NRWLCT02SMD  920      
203-283 4 Milford CT NRWLCT02SMD  920      
203-283 5 Milford CT NRWLCT02SMD  920      
203-283 7 Milford CT NRWLCT02SMD  920      
203-286 6 Norwalk CT NRWLCT02SMD  920   2007-09-20   
203-286 7 Norwalk CT NRWLCT02SMD  920   2007-09-20   
203-286 8 Norwalk CT NRWLCT02SMD  920   2007-09-20   
203-290 4 Bridgeport CT NRWLCT02SMD  920   2014-05-02   
203-292 3 Fairfield CT NRWLCT02SMD  920      
203-292 5 Fairfield CT NRWLCT02SMD  920      
203-292 6 Fairfield CT NRWLCT02SMD  920      
203-292 8 Fairfield CT NRWLCT02SMD  920      
203-292 9 Fairfield CT NRWLCT02SMD  920      
203-293 4 Westport CT NRWLCT02SMD  920   2007-12-07   
203-295 8 Norwalk CT NRWLCT02SMD  920   2011-05-05   
203-296 1 Bridgeport CT NRWLCT02SMD  920   2006-04-16   
203-296 2 Bridgeport CT NRWLCT02SMD  920   2006-04-16   
203-296 4 Bridgeport CT NRWLCT02SMD  920   2007-04-21   
203-296 9 Bridgeport CT NRWLCT02SMD  920   2006-04-16   
203-298 4 New Haven CT NRWLCT02SMD  920      
203-298 9 New Haven CT NRWLCT02SMD  920      
203-301 4 Milford CT NRWLCT02SMD  920   2007-11-08   
203-309 5 Darien CT NRWLCT02SMD  920   2011-08-19   
203-340 2 Greenwich CT WHPLNYWPXSX  132   2005-01-29   
203-344 1 Old Greenwich CT NRWLCT02SMD  920      
203-349 5 Westport CT NRWLCT02SMD  920   2010-09-23   
203-362 5 Bridgeport CT NRWLCT02SMD  920   2006-02-16   
203-388 8 Stamford CT NRWLCT02SMD  920   2008-04-11   
203-406 7 Stamford CT NRWLCT02SMD  920   2010-07-23   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 >>

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.