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: 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD

1 2 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
240-292 5 Washington Zone 11 MD LARLMDCC5MD  236   2009-05-14   
240-552 8 Washington Zone 10 MD LARLMDCC5MD  236   2015-02-16   
240-612 A Washington Zone 5 MD LARLMDCC5MD  236      
240-612 0 Washington Zone 5 MD LARLMDCC5MD  236   2010-10-02   
240-612 1 Washington Zone 5 MD LARLMDCC5MD  236   2010-10-02   
240-612 2 Washington Zone 5 MD LARLMDCC5MD  236   2010-10-02   
240-612 3 Washington Zone 5 MD LARLMDCC5MD  236   2010-10-02   
240-612 4 Washington Zone 5 MD LARLMDCC5MD  236   2010-10-02   
240-612 5 Washington Zone 5 MD LARLMDCC5MD  236   2010-10-02   
240-612 6 Washington Zone 5 MD LARLMDCC5MD  236   2010-10-02   
240-612 7 Washington Zone 5 MD LARLMDCC5MD  236   2010-10-02   
240-612 8 Washington Zone 5 MD LARLMDCC5MD  236   2010-10-02   
240-612 9 Washington Zone 5 MD LARLMDCC5MD  236   2010-10-02   
240-630 6 Washington Zone 2 MD LARLMDCC5MD  236   2013-12-02   
240-802 3 Washington Zone 2 MD LARLMDCC5MD  236   2016-03-16   
240-802 4 Washington Zone 2 MD LARLMDCC5MD  236   2015-03-04   
240-848 9 Gaithersburg MD LARLMDCC5MD  236   2011-10-04   
240-857 A Washington Zone 5 MD LARLMDCC5MD  236      
240-863 A Washington Zone 3 MD LARLMDCC5MD  236      
240-863 0 Washington Zone 3 MD LARLMDCC5MD  236      
301-260 4 Ashton MD LARLMDCC5MD  236   2006-05-28   
301-288 2 Washington Zone 12 MD LARLMDCC5MD  236   2006-05-28   
301-323 A Laurel MD LARLMDCC5MD  236      
301-323 0 Laurel MD LARLMDCC5MD  236      
301-323 1 Laurel MD LARLMDCC5MD  236      
301-323 2 Laurel MD LARLMDCC5MD  236      
301-323 4 Laurel MD LARLMDCC5MD  236      
301-323 6 Laurel MD LARLMDCC5MD  236      
301-323 7 Laurel MD LARLMDCC5MD  236      
301-323 9 Laurel MD LARLMDCC5MD  236      
301-339 6 Washington Zone 10 MD LARLMDCC5MD  236   2012-03-02   
301-361 A Washington Zone 4 MD LARLMDCC5MD  236      
301-389 A Washington Zone 13 MD LARLMDCC5MD  236      
301-389 0 Washington Zone 13 MD LARLMDCC5MD  236      
301-389 1 Washington Zone 13 MD LARLMDCC5MD  236      
301-389 4 Washington Zone 13 MD LARLMDCC5MD  236      
301-389 7 Washington Zone 13 MD LARLMDCC5MD  236      
301-389 8 Washington Zone 13 MD LARLMDCC5MD  236      
301-389 9 Washington Zone 13 MD LARLMDCC5MD  236      
301-532 4 Laurel (Baltimore LATA) MD BLTMMDDNDS2  238   2016-04-21   
301-756 A Washington Zone 14 MD LARLMDCC5MD  236      
301-756 0 Washington Zone 14 MD LARLMDCC5MD  236      
301-756 3 Washington Zone 14 MD LARLMDCC5MD  236      
301-756 4 Washington Zone 14 MD LARLMDCC5MD  236      
301-756 7 Washington Zone 14 MD LARLMDCC5MD  236      
301-756 8 Washington Zone 14 MD LARLMDCC5MD  236      
301-756 9 Washington Zone 14 MD LARLMDCC5MD  236      
301-836 4 Washington Zone 5 MD LARLMDCC5MD  236   2010-12-22   
301-968 8 Washington Zone 2 MD LARLMDCC5MD  236   2010-07-22   
301-981 A Washington Zone 5 MD LARLMDCC5MD  236      
410-369 A Baltimore MD BLTMMDDNDS2  238      
410-369 0 Baltimore MD BLTMMDDNDS2  238      
410-369 1 Baltimore MD BLTMMDDNDS2  238      
410-369 2 Baltimore MD BLTMMDDNDS2  238      
410-369 3 Baltimore MD BLTMMDDNDS2  238      
410-369 4 Baltimore MD BLTMMDDNDS2  238      
410-369 5 Baltimore MD BLTMMDDNDS2  238      
410-369 7 Baltimore MD BLTMMDDNDS2  238      
410-369 9 Baltimore MD BLTMMDDNDS2  238      
410-406 3 Essex MD BLTMMDDNDS2  238   2006-06-01   
410-565 A Arbutus MD BLTMMDDNDS2  238      
410-565 0 Arbutus MD BLTMMDDNDS2  238      
410-565 1 Arbutus MD BLTMMDDNDS2  238      
410-565 3 Arbutus MD BLTMMDDNDS2  238      
410-565 4 Arbutus MD BLTMMDDNDS2  238      
410-565 7 Arbutus MD BLTMMDDNDS2  238      
410-565 9 Arbutus MD BLTMMDDNDS2  238      
410-589 A Brooklyn Park-Linthicum MD BLTMMDDNDS2  238      
410-589 1 Brooklyn Park-Linthicum MD BLTMMDDNDS2  238      
410-589 4 Brooklyn Park-Linthicum MD BLTMMDDNDS2  238      
410-589 7 Brooklyn Park-Linthicum MD BLTMMDDNDS2  238      
410-589 8 Brooklyn Park-Linthicum MD BLTMMDDNDS2  238      
410-589 9 Brooklyn Park-Linthicum MD BLTMMDDNDS2  238      
410-595 A Glen Burnie MD BLTMMDDNDS2  238      
410-595 0 Glen Burnie MD BLTMMDDNDS2  238      
410-595 3 Glen Burnie MD BLTMMDDNDS2  238      
410-595 4 Glen Burnie MD BLTMMDDNDS2  238      
410-595 7 Glen Burnie MD BLTMMDDNDS2  238      
410-595 8 Glen Burnie MD BLTMMDDNDS2  238      
410-595 9 Glen Burnie MD BLTMMDDNDS2  238      
410-645 5 Woodlawn MD BLTMMDDNDS2  238   2006-06-01   
410-650 7 Dundalk MD BLTMMDDNDS2  238   2006-06-01   
410-680 A Ellicott City MD BLTMMDDNDS2  238      
410-680 0 Ellicott City MD BLTMMDDNDS2  238      
410-680 1 Ellicott City MD BLTMMDDNDS2  238      
410-680 4 Ellicott City MD BLTMMDDNDS2  238      
410-680 5 Ellicott City MD BLTMMDDNDS2  238      
410-680 7 Ellicott City MD BLTMMDDNDS2  238      
410-680 9 Ellicott City MD BLTMMDDNDS2  238      
410-717 A Elkridge MD BLTMMDDNDS2  238      
410-717 0 Elkridge MD BLTMMDDNDS2  238      
410-717 1 Elkridge MD BLTMMDDNDS2  238      
410-717 4 Elkridge MD BLTMMDDNDS2  238      
410-717 7 Elkridge MD BLTMMDDNDS2  238      
410-717 9 Elkridge MD BLTMMDDNDS2  238      
410-741 4 West River MD BLTMMDDNDS2  238   2013-01-11   
410-794 A Columbia MD BLTMMDDNDS2  238      
410-794 0 Columbia MD BLTMMDDNDS2  238      
410-794 1 Columbia MD BLTMMDDNDS2  238      
410-794 2 Columbia MD BLTMMDDNDS2  238      

1 2 >>

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.