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.

NPA: 410 [Rate centres in NPA 410] [Dial plan for NPA 410]

NXX: 364

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-364 A Hillsboro MD HLBOMDTKRS0  9212 VERIZON MARYLAND, INC. 242      
410-364 0 Hillsboro MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2004-04-03   
410-364 3 Hillsboro MD ESTNMDESMMD  228C IDT AMERICA, CORP. - MD 242   2006-05-21   
410-364 4 Hillsboro MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2017-04-13   
410-364 5 Hillsboro MD HLBOMDTKRS0  9212 VERIZON MARYLAND, INC. 242      
410-364 6 Hillsboro MD   145J TERRA NOVA TELECOM INC. 242   2024-02-14   
410-364 7 Hillsboro MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2008-08-30   
410-364 8 Hillsboro MD SLBRMD902MD  073H TELNYX LLC 242   2017-09-13   
410-364 9 Hillsboro MD HLBOMDTKRS0  9212 VERIZON MARYLAND, INC. 242      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.