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.

Odenton, MD

<< 1 2 3 4 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-927 4 BLTMMDSNNMD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-927 5 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2011-09-04   
410-927 6 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-09-09   
410-927 7 BLTMMDSNNMD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-927 8 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2011-11-05   
410-927 9 BLTMMDSNNMD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-230 A PIVLMDPKXFX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-230 1 PIVLMDPKXFX  829J PAETEC ITEL, LLC 238      
443-230 2 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   
443-230 3 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-07-04   
443-230 4 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-09-08   
443-230 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-29   
443-230 6 BLTMMDCH40Z  5562 METROPCS, INC. 238   2016-11-17   
443-230 7 BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
443-230 8   515J IP HORIZON LLC 238   2016-01-04   
443-230 9   515J IP HORIZON LLC 238   2015-03-23   
443-351 A PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-351 0 PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-351 1 PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-351 2 PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-351 3 PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-351 4 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-09-03   
443-351 5 BLTMMDCH40Z  5562 METROPCS, INC. 238   2017-01-19   
443-351 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-03-01   
443-351 7 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   
443-351 8 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-02-27   
443-351 9 PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-396 A BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-396 0   145J TERRA NOVA TELECOM INC. 238   2024-10-12   
443-396 1 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-396 2 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-07   
443-396 3 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-03-07   
443-396 5 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2020-10-28   
443-396 6   515J IP HORIZON LLC 238   2017-07-07   
443-396 7 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2018-05-27   
443-396 8 BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-26   
443-396 9 BLTMMDCH40Z  5562 METROPCS, INC. 238   2020-04-02   
443-698 A BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-698 0 BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-698 1 PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2005-11-11   
443-698 2 BLTMMDCH40Z  5562 METROPCS, INC. 238   2013-06-14   
443-698 3 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2016-08-25   
443-698 4 BLTMMDCH40Z  5562 METROPCS, INC. 238   2019-12-28   
443-698 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-03-01   
443-698 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-03-01   
443-698 7   145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-698 8 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-02   
443-698 9 BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-704 A PIVLMDPKXGX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-704 0 PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      

<< 1 2 3 4 >>

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.