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: 606 [Rate centres in NPA 606] [Dial plan for NPA 606]

NXX: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
606-257 A South Williamson KY GRTWKYMAJMD  4369 LEVEL 3 COMMUNICATIONS, LLC - KY 466      
606-257 0 South Williamson KY GRTWKYMAJMD  4369 LEVEL 3 COMMUNICATIONS, LLC - KY 466      
606-257 1 South Williamson KY WNCHKYMAXLY  238H CEBRIDGE TELECOM KY, LLC DBA SUDDENLINK COMM 466   2014-03-01   
606-257 2 South Williamson KY WNCHKYMAEMD  896E ONVOY, LLC - KY 466   2016-09-20   
606-257 3 South Williamson KY LXTNKY24HMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 466   2012-03-10   
606-257 4 South Williamson KY GRTWKYMAJMD  4369 LEVEL 3 COMMUNICATIONS, LLC - KY 466   2004-05-27   
606-257 5 South Williamson KY WNCHKYMAXLY  238H CEBRIDGE TELECOM KY, LLC DBA SUDDENLINK COMM 466   2007-01-10   
606-257 6 South Williamson KY WNCHKYMAXUX  8406 TELEPORT COMMUNICATIONS AMERICA, LLC - KY 466   2016-03-19   
606-257 7 South Williamson KY WNCHKYMAEMD  896E ONVOY, LLC - KY 466   2016-09-20   
606-257 8 South Williamson KY DAVLKYMAX7X  073H TELNYX LLC 466   2020-07-17   
606-257 9 South Williamson KY GRTWKYMAJMD  4369 LEVEL 3 COMMUNICATIONS, LLC - KY 466      

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.