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.
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Switch: GLNDMTAJRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-228 7 Glasgow MT 7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650   2019-04-09   
406-345 A Glendive MT 7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650      
406-345 2 Glendive MT 7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650      
406-345 3 Glendive MT 7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650      
406-345 7 Glendive MT 7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650      
406-345 8 Glendive MT 7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650      
406-345 9 Glendive MT 7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650      
406-377 A Glendive MT 7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650      
406-789 8 Medicine Lake MT 7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650   2019-12-16   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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