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: 4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
240-221 8 Washington Zone 11 MD   236   2004-04-06   
240-318 8 Washington Zone 16 MD   236   2004-04-06   
240-487 4 Washington Zone 4 MD   236   2004-04-06   
240-533 3 Washington Zone 3 MD   236   2004-04-06   
240-544 4 Washington Zone 14 MD   236   2004-04-06   
240-767 7 Washington Zone 5 MD   236   2004-04-06   
301-260 6 Ashton MD   236   2004-04-06   
301-263 8 Washington Zone 2 MD   236   2004-04-06   
301-356 A Laurel MD LARLMDCCDS0  236      
301-356 9 Laurel MD   236   2004-04-05   
301-556 5 Gaithersburg MD   236   2004-05-06   
301-605 8 Washington Zone 10 MD   236   2004-04-06   
301-823 8 Washington Zone 13 MD   236   2004-04-06   
301-885 5 Waldorf MD   236   2004-04-06   
301-971 1 Washington Zone 6 MD   236   2004-04-06   
410-248 5 Parkville MD   238   2003-11-08   
410-307 1 Towson MD   238   2003-11-08   
410-316 1 Cockeysville MD   238   2003-11-08   
410-317 1 Armiger-Gibson Island MD   238   2004-02-14   
410-349 5 Annapolis MD   238   2003-11-08   
410-387 0 Baltimore MD   238   2011-10-11   
410-401 3 Brooklyn Park-Linthicum MD   238   2004-02-14   
410-406 0 Essex MD   238   2003-11-08   
410-412 5 Glen Burnie MD   238   2003-11-08   
410-413 8 Pikesville MD   238   2017-10-23   
410-420 4 Bel Air MD   238   2004-02-14   
410-505 1 Ellicott City MD   238   2004-02-14   
410-510 3 Fork MD   238   2004-02-14   
410-514 1 Severn MD   238   2004-02-14   
410-517 6 Reisterstown MD   238   2003-11-08   
410-541 3 Severna Park MD   238   2004-04-30   
410-645 3 Woodlawn MD   238   2004-02-11   
410-650 3 Dundalk MD   238   2003-11-08   
410-701 1 Randallstown MD   238   2004-02-16   
410-753 3 Pikesville MD   238   2003-11-08   
410-756 7 Taneytown MD   238   2004-02-14   
410-759 8 Baltimore MD   238   2016-12-24   
410-774 2 Crofton MD   238   2004-02-14   
410-782 6 Elkridge MD   238   2004-02-14   
410-904 2 Waterloo MD   238   2004-02-14   
410-942 4 Havre de Grace MD   238   2004-02-14   
410-970 5 Sykesville MD   238   2004-02-14   
443-244 8 Westminster MD   238   2003-11-08   
443-276 3 Columbia MD   238   2003-11-08   
443-278 A Baltimore MD BLTMMDCH08Z  238      
443-278 9 Baltimore MD   238   2003-11-23   
443-297 5 Arbutus MD   238   2004-02-14   
443-341 2 Catonsville MD   238   2004-02-14   
443-375 4 Hampstead MD   238   2004-02-14   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.