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: 343

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-343 A Sparks-Glencoe MD PKTNMDPKRS0  9212 VERIZON MARYLAND, INC. 238      
410-343 0 Sparks-Glencoe MD PKTNMDPKRS0  9212 VERIZON MARYLAND, INC. 238      
410-343 1 Sparks-Glencoe MD PKTNMDPKRS0  9212 VERIZON MARYLAND, INC. 238      
410-343 2 Sparks-Glencoe MD PKTNMDPKRS0  9212 VERIZON MARYLAND, INC. 238      
410-343 3 Sparks-Glencoe MD PKTNMDPKRS0  9212 VERIZON MARYLAND, INC. 238      
410-343 4 Sparks-Glencoe MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-31   
410-343 5 Sparks-Glencoe MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
410-343 6 Sparks-Glencoe MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
410-343 7 Sparks-Glencoe MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-03-05   
410-343 8 Sparks-Glencoe MD BLTMMDCHAMD  1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 238   2006-01-31   
410-343 9 Sparks-Glencoe MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.