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: 617

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-617 A Baltimore MD BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-617 0 Baltimore MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-06-12   
410-617 1 Baltimore MD BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-617 2 Baltimore MD BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-617 3 Baltimore MD BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-617 4 Baltimore MD BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-617 5 Baltimore MD BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-617 6 Baltimore MD BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-617 7 Baltimore MD BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238      
410-617 8 Baltimore MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-06-12   
410-617 9 Baltimore MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-08-12   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.