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: 403

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-403 A Cockeysville MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-403 0 Cockeysville MD   876D ONVOY, LLC - MD 238   2016-03-28   
410-403 1 Cockeysville MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-403 2 Cockeysville MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-403 3 Cockeysville MD   876D ONVOY, LLC - MD 238   2016-03-09   
410-403 4 Cockeysville MD   876D ONVOY, LLC - MD 238   2016-03-28   
410-403 5 Cockeysville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-19   
410-403 6 Cockeysville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2016-09-08   
410-403 7 Cockeysville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-19   
410-403 8 Cockeysville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-08-13   
410-403 9 Cockeysville MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.