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: BLNGMTMARMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-298 9 Columbus MT 357E YMAX COMMUNICATIONS CORP. - MT 650   2011-04-04   
406-318 A Billings MT 357E YMAX COMMUNICATIONS CORP. - MT 650      
406-318 0 Billings MT 357E YMAX COMMUNICATIONS CORP. - MT 650   2011-04-03   
406-318 1 Billings MT 357E YMAX COMMUNICATIONS CORP. - MT 650   2011-04-03   
406-629 9 Hardin MT 357E YMAX COMMUNICATIONS CORP. - MT 650   2011-04-04   
406-633 8 Laurel MT 357E YMAX COMMUNICATIONS CORP. - MT 650   2011-04-04   
406-962 8 Joliet MT 357E YMAX COMMUNICATIONS CORP. - MT 650   2011-04-04   

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

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