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: 6119 LEVEL 3 COMMUNICATIONS, LLC - MD

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
227-233 5 Washington Zone 2 MD MCLNVA23DS4  236   2024-07-14   
227-236 2 Washington Zone 10 MD MCLNVA23DS4  236   2024-05-03   
227-271 4 Washington Zone 10 MD MCLNVA23DS4  236   2025-03-14   
240-204 6 Washington Zone 2 MD MCLNVA23DS4  236   2013-02-26   
240-205 7 Washington Zone 10 MD MCLNVA23DS4  236   2006-01-02   
240-205 8 Washington Zone 10 MD MCLNVA23DS4  236   2006-01-02   
240-206 6 Washington Zone 14 MD MCLNVA23DS4  236   2008-02-15   
240-207 4 Damascus MD MCLNVA23DS4  236   2006-03-25   
240-215 A Frederick MD FRDRMDFRXMD  240      
240-215 0 Frederick MD FRDRMDFRXMD  240      
240-215 1 Frederick MD FRDRMDFRXMD  240      
240-215 3 Frederick MD FRDRMDFRXMD  240   2005-02-07   
240-215 4 Frederick MD FRDRMDFRXMD  240   2002-06-28   
240-215 6 Frederick MD FRDRMDFRXMD  240      
240-215 8 Frederick MD FRDRMDFRXMD  240      
240-229 A Waldorf MD MCLNVA23DS4  236      
240-229 0 Waldorf MD MCLNVA23DS4  236      
240-230 A Hughesville MD MCLNVA23DS4  236      
240-230 3 Hughesville MD MCLNVA23DS4  236   2006-01-02   
240-232 A Washington Zone 14 MD MCLNVA23DS4  236      
240-232 0 Washington Zone 14 MD MCLNVA23DS4  236      
240-233 2 Tompkinsville MD MCLNVA23DS4  236   2006-03-05   
240-233 9 Tompkinsville MD MCLNVA23DS4  236   2012-03-10   
240-236 9 Frederick MD FRDRMDFRXMD  240   2015-02-06   
240-240 9 Damascus (Hagerstown LATA) MD FRDRMDFRXMD  240   2021-11-11   
240-241 7 Washington Zone 13 MD MCLNVA23DS4  236   2007-12-05   
240-249 0 Mechanicsville MD MCLNVA23DS4  236   2006-03-03   
240-249 8 Mechanicsville MD MCLNVA23DS4  236   2008-08-13   
240-252 A Gaithersburg MD MCLNVA23DS4  236      
240-252 1 Gaithersburg MD MCLNVA23DS4  236   2005-03-18   
240-252 2 Gaithersburg MD MCLNVA23DS4  236   2011-02-03   
240-252 3 Gaithersburg MD MCLNVA23DS4  236   2005-03-18   
240-252 4 Gaithersburg MD MCLNVA23DS4  236      
240-252 5 Gaithersburg MD MCLNVA23DS4  236   2005-03-18   
240-252 6 Gaithersburg MD MCLNVA23DS4  236   2005-03-18   
240-252 7 Gaithersburg MD MCLNVA23DS4  236   2005-03-18   
240-256 3 Leonardtown MD MCLNVA23DS4  236   2006-03-03   
240-257 0 Nanjemoy MD MCLNVA23DS4  236   2006-03-05   
240-257 4 Nanjemoy MD MCLNVA23DS4  236   2011-12-02   
240-258 2 Ridge MD MCLNVA23DS4  236   2006-03-05   
240-258 6 Ridge MD MCLNVA23DS4  236   2008-02-13   
240-267 2 Hagerstown MD FRDRMDFRXMD  240   2017-09-15   
240-273 A Washington Zone 6 MD MCLNVA23DS4  236      
240-273 3 Washington Zone 6 MD MCLNVA23DS4  236      
240-284 A Frostburg MD FRDRMDFRXMD  240      
240-284 4 Frostburg MD FRDRMDFRXMD  240   2005-02-17   
240-284 5 Frostburg MD FRDRMDFRXMD  240   2006-07-30   
240-289 2 Washington Zone 6 MD MCLNVA23DS4  236   2008-02-13   
240-292 0 Washington Zone 11 MD MCLNVA23DS4  236   2005-02-17   
240-292 1 Washington Zone 11 MD MCLNVA23DS4  236   2005-02-17   
240-292 4 Washington Zone 11 MD MCLNVA23DS4  236   2003-01-12   
240-292 6 Washington Zone 11 MD MCLNVA23DS4  236   2006-04-24   
240-293 2 Washington Zone 12 MD MCLNVA23DS4  236   2005-01-04   
240-293 3 Washington Zone 12 MD MCLNVA23DS4  236   2005-01-04   
240-293 4 Washington Zone 12 MD MCLNVA23DS4  236   2003-02-17   
240-293 5 Washington Zone 12 MD MCLNVA23DS4  236   2006-04-07   
240-293 9 Washington Zone 12 MD MCLNVA23DS4  236   2006-07-14   
240-297 A Washington Zone 13 MD MCLNVA23DS4  236      
240-297 0 Washington Zone 13 MD MCLNVA23DS4  236   2004-12-29   
240-297 1 Washington Zone 13 MD MCLNVA23DS4  236   2004-12-29   
240-297 2 Washington Zone 13 MD MCLNVA23DS4  236   2013-03-17   
240-297 3 Washington Zone 13 MD MCLNVA23DS4  236   2005-01-05   
240-297 4 Washington Zone 13 MD MCLNVA23DS4  236      
240-297 5 Washington Zone 13 MD MCLNVA23DS4  236   2005-01-05   
240-297 6 Washington Zone 13 MD MCLNVA23DS4  236   2010-06-21   
240-297 7 Washington Zone 13 MD MCLNVA23DS4  236   2012-03-24   
240-297 8 Washington Zone 13 MD MCLNVA23DS4  236   2014-10-23   
240-307 7 Emmitsburg MD FRDRMDFRXMD  240   2016-10-26   
240-308 6 Damascus MD MCLNVA23DS4  236   2006-12-05   
240-309 6 Leonardtown MD MCLNVA23DS4  236   2012-12-04   
240-312 2 Washington Zone 5 MD MCLNVA23DS4  236   2005-12-11   
240-312 3 Washington Zone 5 MD MCLNVA23DS4  236   2005-12-11   
240-317 2 Lexington Park-Great Mills MD MCLNVA23DS4  236   2008-02-13   
240-317 3 Lexington Park-Great Mills MD MCLNVA23DS4  236   2008-02-13   
240-329 A Hagerstown MD FRDRMDFRXMD  240      
240-329 0 Hagerstown MD FRDRMDFRXMD  240      
240-329 2 Hagerstown MD FRDRMDFRXMD  240   2005-04-15   
240-329 3 Hagerstown MD FRDRMDFRXMD  240   2005-04-15   
240-329 4 Hagerstown MD FRDRMDFRXMD  240   2002-06-28   
240-329 9 Hagerstown MD FRDRMDFRXMD  240      
240-334 A Washington Zone 14 MD MCLNVA23DS4  236      
240-334 4 Washington Zone 14 MD MCLNVA23DS4  236      
240-334 6 Washington Zone 14 MD MCLNVA23DS4  236      
240-342 3 Ashton MD MCLNVA23DS4  236   2006-06-26   
240-345 A Ashton (Baltimore LATA) MD BLTMMDSN6MD  238      
240-345 1 Ashton (Baltimore LATA) MD BLTMMDSN6MD  238   2011-09-02   
240-345 3 Ashton (Baltimore LATA) MD BLTMMDSN6MD  238   2006-08-11   
240-345 9 Ashton (Baltimore LATA) MD BLTMMDSN6MD  238   2008-07-18   
240-348 A Washington Zone 16 MD MCLNVA23DS4  236      
240-348 1 Washington Zone 16 MD MCLNVA23DS4  236      
240-348 5 Washington Zone 16 MD MCLNVA23DS4  236   2012-01-14   
240-348 6 Washington Zone 16 MD MCLNVA23DS4  236   2011-10-09   
240-356 A Myersville MD FRDRMDFRXMD  240      
240-356 0 Myersville MD FRDRMDFRXMD  240      
240-356 2 Myersville MD FRDRMDFRXMD  240   2005-07-18   
240-356 4 Myersville MD FRDRMDFRXMD  240   2002-06-28   
240-374 A Laurel MD MCLNVA23DS4  236      
240-374 4 Laurel MD MCLNVA23DS4  236      
240-374 5 Laurel MD MCLNVA23DS4  236      
240-377 A Indian Head MD MCLNVA23DS4  236      

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

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.