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: 457

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-457 A Darlington MD DRTNMDDRRS0  9212 VERIZON MARYLAND, INC. 238      
410-457 0 Darlington MD DRTNMDDRRS0  9212 VERIZON MARYLAND, INC. 238      
410-457 1 Darlington MD BLTMMDCHAMD  1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 238      
410-457 2 Darlington MD DRTNMDDRRS0  9212 VERIZON MARYLAND, INC. 238      
410-457 3 Darlington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
410-457 4 Darlington MD DRTNMDDRRS0  9212 VERIZON MARYLAND, INC. 238      
410-457 5 Darlington MD DRTNMDDRRS0  9212 VERIZON MARYLAND, INC. 238      
410-457 6 Darlington MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
410-457 7 Darlington MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
410-457 8 Darlington MD BLTMMDCH47Z  420C ARMSTRONG TELECOMMUNICATIONS, INC. - MD 238      
410-457 9 Darlington MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.