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: 7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD

1 2 3 4 5 6 7 8 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
240-267 4 Hagerstown MD FRDRMDFRX7X  240   2018-05-11   
240-307 3 Emmitsburg MD FRDRMDFRX7X  240   2008-07-01   
240-341 A Buckeystown MD FRDRMDFRX7X  240      
240-341 3 Buckeystown MD FRDRMDFRX7X  240   2015-01-26   
240-341 9 Buckeystown MD FRDRMDFRX7X  240   2009-04-18   
240-345 4 Ashton (Baltimore LATA) MD BLTOMDKHDS0  238   2007-12-01   
240-366 4 Williamsport MD FRDRMDFRX7X  240   2014-07-15   
240-394 3 Mount Airy MD FRDRMDFRX7X  240   2010-02-01   
240-397 7 Frederick MD FRDRMDFRX7X  240   2009-11-30   
240-451 2 Thurmont MD FRDRMDFRX7X  240   2018-07-12   
240-490 3 Middletown MD FRDRMDFRX7X  240   2010-02-01   
240-500 3 Hagerstown MD FRDRMDFRX7X  240   2011-09-28   
240-509 3 Washington Zone 14 (Baltimore LATA) MD BLTOMDKHDS0  238   2008-10-01   
240-512 2 Washington Zone 13 (Baltimore LATA) MD BLTOMDKHDS0  238   2007-12-03   
240-512 3 Washington Zone 13 (Baltimore LATA) MD BLTOMDKHDS0  238   2008-10-01   
240-513 3 Hagerstown MD FRDRMDFRX7X  240   2013-12-06   
240-565 6 Laurel (Baltimore LATA) MD BLTOMDKHDS0  238   2007-03-01   
240-591 5 Hagerstown MD FRDRMDFRX7X  240   2020-10-05   
240-591 6 Hagerstown MD FRDRMDFRX7X  240   2020-10-05   
240-591 7 Hagerstown MD FRDRMDFRX7X  240   2020-10-05   
240-609 3 Cumberland MD FRDRMDFRX7X  240   2015-07-21   
240-651 7 Frederick MD FRDRMDFRX7X  240   2017-04-06   
240-657 A Frostburg MD FRDRMDFRX7X  240      
240-657 3 Frostburg MD FRDRMDFRX7X  240   2016-02-20   
240-710 A Frederick MD FRDRMDFRX7X  240      
240-710 0 Frederick MD FRDRMDFRX7X  240   2020-02-13   
240-710 1 Frederick MD FRDRMDFRX7X  240   2020-02-13   
240-710 2 Frederick MD FRDRMDFRX7X  240   2020-02-13   
240-710 3 Frederick MD FRDRMDFRX7X  240   2020-02-13   
240-710 4 Frederick MD FRDRMDFRX7X  240   2020-02-13   
240-710 5 Frederick MD FRDRMDFRX7X  240   2020-02-13   
240-710 6 Frederick MD FRDRMDFRX7X  240   2020-02-13   
240-710 7 Frederick MD FRDRMDFRX7X  240   2020-02-13   
240-710 8 Frederick MD FRDRMDFRX7X  240   2020-02-13   
240-710 9 Frederick MD FRDRMDFRX7X  240   2020-02-13   
240-734 4 Smithsburg MD FRDRMDFRX7X  240   2017-09-11   
240-772 3 Frederick MD FRDRMDFRX7X  240   2012-08-29   
240-816 2 Keedysville MD FRDRMDFRX7X  240   2016-11-14   
240-865 8 Washington Zone 14 (Baltimore LATA) MD BLTOMDKHDS0  238   2007-12-03   
240-913 2 Damascus (Hagerstown LATA) MD FRDRMDFRX7X  240   2019-05-30   
240-998 5 Hancock MD FRDRMDFRX7X  240   2019-01-07   
301-302 8 Hagerstown MD FRDRMDFRX7X  240   2006-08-01   
301-304 3 Walkersville MD FRDRMDFRX7X  240   2009-09-02   
301-327 3 Washington Zone 15 (Baltimore LATA) MD BLTOMDKHDS0  238   2007-12-01   
301-501 5 Oakland MD FRDRMDFRX7X  240   2010-01-04   
301-712 A Frederick MD FRDRMDFRX7X  240      
301-712 9 Frederick MD FRDRMDFRX7X  240   2004-09-13   
301-723 7 Cumberland MD FRDRMDFRX7X  240   2006-07-01   
301-732 8 Frederick MD FRDRMDFRX7X  240   2015-07-21   
301-810 4 Buckeystown MD FRDRMDFRX7X  240   2004-09-13   

1 2 3 4 5 6 7 8 >>

Last updated: Sun, 28 Feb 2021 19:06:05 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.