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.

Switch: BLTMMDSN5MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-841 A Laurel (Baltimore LATA) MD 4773 XO MARYLAND, LLC 238      
240-842 A Washington Zone 14 (Baltimore LATA) MD 4773 XO MARYLAND, LLC 238      
240-843 A Washington Zone 13 (Baltimore LATA) MD 4773 XO MARYLAND, LLC 238      
443-200 A Woodlawn MD 4773 XO MARYLAND, LLC 238      
443-276 A Columbia MD 4773 XO MARYLAND, LLC 238      
443-279 A Towson MD 4773 XO MARYLAND, LLC 238      
443-281 A Cockeysville MD 4773 XO MARYLAND, LLC 238      
443-288 A Ellicott City MD 4773 XO MARYLAND, LLC 238      
443-308 A Severn MD 4773 XO MARYLAND, LLC 238      
443-334 A Pikesville MD 4773 XO MARYLAND, LLC 238      
443-400 A Brooklyn Park-Linthicum MD 4773 XO MARYLAND, LLC 238      
443-407 A Dundalk MD 4773 XO MARYLAND, LLC 238      
443-408 A Sparrows Point MD 4773 XO MARYLAND, LLC 238      
443-430 A Columbia MD 4773 XO MARYLAND, LLC 238      
443-433 A Annapolis MD 4773 XO MARYLAND, LLC 238      
443-458 A Annapolis MD 4773 XO MARYLAND, LLC 238      
443-460 A Essex MD 4773 XO MARYLAND, LLC 238      
443-498 A Catonsville MD 4773 XO MARYLAND, LLC 238      
443-503 A Dundalk MD 4773 XO MARYLAND, LLC 238      
443-524 A Baltimore MD 4773 XO MARYLAND, LLC 238      
443-548 A Pikesville MD 4773 XO MARYLAND, LLC 238      
443-557 A Glen Burnie MD 4773 XO MARYLAND, LLC 238      
443-558 A Aberdeen MD 4773 XO MARYLAND, LLC 236      
443-568 A Arbutus MD 4773 XO MARYLAND, LLC 238      
443-576 A Randallstown MD 4773 XO MARYLAND, LLC 238      
443-588 A Parkville MD 4773 XO MARYLAND, LLC 238      
443-637 A Armiger-Gibson Island MD 4773 XO MARYLAND, LLC 238      
443-650 A Reisterstown MD 4773 XO MARYLAND, LLC 238      
443-692 A Baltimore MD 4773 XO MARYLAND, LLC 238      
443-701 A Arbutus MD 4773 XO MARYLAND, LLC 238      
443-703 A Baltimore MD 4773 XO MARYLAND, LLC 238      
443-710 A Catonsville MD 4773 XO MARYLAND, LLC 238      
443-773 A Brooklyn Park-Linthicum MD 4773 XO MARYLAND, LLC 238      
443-793 A Parkville MD 4773 XO MARYLAND, LLC 238      
443-795 A Severn MD 4773 XO MARYLAND, LLC 238      
443-796 A Pikesville MD 4773 XO MARYLAND, LLC 238      
443-797 A Towson MD 4773 XO MARYLAND, LLC 238      
443-815 A Essex MD 4773 XO MARYLAND, LLC 238      
443-816 A Severna Park MD 4773 XO MARYLAND, LLC 238      
443-817 A Armiger-Gibson Island MD 4773 XO MARYLAND, LLC 238      
443-891 A Glen Burnie MD 4773 XO MARYLAND, LLC 238      
443-893 A Woodlawn MD 4773 XO MARYLAND, LLC 238      
443-973 A Ellicott City MD 4773 XO MARYLAND, LLC 238      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.