Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 410 [Rate centres in NPA 410] [Dial plan for NPA 410]

NXX: 891

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-891 A Cockeysville MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-891 0 Cockeysville MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-891 1 Cockeysville MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-891 2 Cockeysville MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-891 3 Cockeysville MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-891 4 Cockeysville MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2010-02-25   
410-891 5 Cockeysville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-02-18   
410-891 6 Cockeysville MD   876D ONVOY, LLC - MD 238   2016-03-31   
410-891 7 Cockeysville MD   876D ONVOY, LLC - MD 238   2024-06-07   
410-891 8 Cockeysville MD   318J COMCAST IP PHONE, LLC 238   2008-04-10   
410-891 9 Cockeysville MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      

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

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