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: 667 [Rate centres in NPA 667] [Dial plan for NPA 667]

NXX: 318

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-318 A Cockeysville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
667-318 0 Cockeysville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-07-03   
667-318 1 Cockeysville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-11-26   
667-318 2 Cockeysville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2021-07-13   
667-318 3 Cockeysville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-11   
667-318 4 Cockeysville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-11   
667-318 5 Cockeysville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-11-26   
667-318 6 Cockeysville MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-10-10   
667-318 7 Cockeysville MD BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2021-10-25   
667-318 8 Cockeysville MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-09-10   
667-318 9 Cockeysville MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2022-02-01   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.