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.

Switch: BLNGMTWEAMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-351 8 Forsyth MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2018-05-14   
406-371 A Billings MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650      
406-371 2 Billings MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2017-08-20   
406-371 4 Billings MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2013-08-30   
406-371 9 Billings MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2004-09-19   
406-624 3 Bozeman MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2007-05-16   
406-624 4 Bozeman MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2019-02-25   
406-629 3 Hardin MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2010-10-01   
406-812 3 Laurel MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2012-02-01   
406-813 A Belgrade MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650      
406-813 3 Belgrade MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2011-11-01   
406-943 3 Sidney MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2016-11-28   
406-944 3 Miles City MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2010-10-01   
406-946 3 Livingston MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2016-03-18   
406-948 3 Glendive MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2010-10-01   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.