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: 290

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-290 A Baltimore MD BLTMMDCHXHX  515J IP HORIZON LLC 238      
667-290 0 Baltimore MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-11-01   
667-290 1 Baltimore MD   515J IP HORIZON LLC 238   2020-10-31   
667-290 2 Baltimore MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-11-01   
667-290 3 Baltimore MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-11-01   
667-290 4 Baltimore MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-11-01   
667-290 5 Baltimore MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-11-01   
667-290 6 Baltimore MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-12-26   
667-290 7 Baltimore MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-12-26   
667-290 8 Baltimore MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-02-18   
667-290 9 Baltimore MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-02-18   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.