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: 678

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-678 A Columbia MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-678 0 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2021-10-16   
667-678 1 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2021-10-16   
667-678 2 Columbia MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-10-15   
667-678 3 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-10-24   
667-678 4 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-10-24   
667-678 5 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-10-24   
667-678 6 Columbia MD BLTQMD013MD  939H COMMIO, LLC 238   2021-10-16   
667-678 7 Columbia MD BLTQMD013MD  939H COMMIO, LLC 238   2021-10-16   
667-678 8 Columbia MD BLTQMD013MD  939H COMMIO, LLC 238   2021-10-16   
667-678 9 Columbia MD BLTQMD013MD  939H COMMIO, LLC 238   2021-10-16   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.