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: BLNGMT939MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
307-227 7 Mammoth WY 145J TERRA NOVA TELECOM INC. 650      
307-424 4 Lake WY 145J TERRA NOVA TELECOM INC. 650      
406-213 2 Colstrip MT 145J TERRA NOVA TELECOM INC. 650      
406-318 3 Billings MT 145J TERRA NOVA TELECOM INC. 650      
406-425 6 Red Lodge MT 145J TERRA NOVA TELECOM INC. 650      
406-482 7 Sidney MT 145J TERRA NOVA TELECOM INC. 650      
406-489 5 Sidney MT 145J TERRA NOVA TELECOM INC. 650      
406-749 3 Colstrip MT 145J TERRA NOVA TELECOM INC. 650      
406-796 7 Wibaux MT 145J TERRA NOVA TELECOM INC. 650      
406-853 7 Miles City MT 145J TERRA NOVA TELECOM INC. 650      
406-874 0 Miles City MT 145J TERRA NOVA TELECOM INC. 650      
406-919 A Belgrade MT 145J TERRA NOVA TELECOM INC. 650      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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