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: 5966 LIGHTWAVE COMMUNICATIONS, LLC - MD

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
202-469 8 Washington Zone 1 DC   236   2008-09-12   
240-207 2 Damascus MD HRNDVACKBMD  236   2005-07-24   
240-477 A Gaithersburg MD HRNDVACKBMD  236      
240-477 1 Gaithersburg MD HRNDVACKBMD  236   2005-06-19   
240-487 7 Washington Zone 4 MD HRNDVACKBMD  236   2005-07-04   
240-821 A Washington Zone 3 MD HRNDVACKBMD  236      
240-821 1 Washington Zone 3 MD HRNDVACKBMD  236   2005-06-26   
240-821 9 Washington Zone 3 MD HRNDVACKBMD  236   2006-03-26   
301-375 4 Indian Head MD HRNDVACKBMD  236   2005-10-07   
301-539 5 La Plata MD HRNDVACKBMD  236   2005-10-07   
301-543 8 Laurel MD HRNDVACKBMD  236   2005-04-21   
301-861 1 Waldorf MD HRNDVACKBMD  236   2005-10-07   
301-880 5 Lexington Park-Great Mills MD HRNDVACKBMD  236   2005-10-07   
410-501 A Arbutus MD PIVLMDPKFMD  238      
410-501 1 Arbutus MD PIVLMDPKFMD  238   2005-07-30   
410-568 7 Cockeysville MD PIVLMDPKFMD  238   2005-10-07   
410-701 5 Randallstown MD SLSPMDBCDS0  238   2005-07-04   
410-856 1 Baltimore MD SLSPMDBCDS0  238   2005-04-21   
443-209 5 Havre de Grace MD PIVLMDPKFMD  238   2005-10-07   
443-274 6 Severn MD PIVLMDPKFMD  238   2005-07-04   
443-319 4 Columbia MD PIVLMDPKFMD  238   2005-07-04   
443-433 1 Annapolis MD PIVLMDPKFMD  238   2005-10-07   
443-491 2 Parkton MD PIVLMDPKFMD  238   2005-10-07   
443-855 A Aberdeen MD PIVLMDPKFMD  236      
443-855 1 Aberdeen MD PIVLMDPKFMD  236   2005-06-19   
443-918 3 Taneytown MD PIVLMDPKFMD  238   2005-10-07   
540-242 5 Stafford VA HRNDVACKBMD  236   2005-07-24   
571-224 9 Washington Zone 19 VA HRNDVACKBMD  236   2005-07-24   
703-436 0 Lorton VA HRNDVACKBMD  236   2005-07-24   
703-468 9 Haymarket VA HRNDVACKBMD  236   2005-10-07   
703-504 9 Washington Zone 8 VA HRNDVACKBMD  236   2005-07-04   
703-789 9 Manassas VA HRNDVACKBMD  236   2005-10-07   

Last updated: Thu, 04 Aug 2022 23:14:42 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.