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: ALTNMTXBRS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-288 A Drummond MT 2235 BLACKFOOT TEL. COOP., INC. 648      
406-649 A St Regis MT 2235 BLACKFOOT TEL. COOP., INC. 648      
406-649 2 St Regis MT 2235 BLACKFOOT TEL. COOP., INC. 648      
406-649 7 St Regis MT 2235 BLACKFOOT TEL. COOP., INC. 648      
406-649 9 St Regis MT 2235 BLACKFOOT TEL. COOP., INC. 648      
406-722 A Alberton MT 2235 BLACKFOOT TEL. COOP., INC. 648      
406-822 A Superior MT 2235 BLACKFOOT TEL. COOP., INC. 648      
406-822 2 Superior MT 2235 BLACKFOOT TEL. COOP., INC. 648      
406-822 3 Superior MT 2235 BLACKFOOT TEL. COOP., INC. 648      
406-822 4 Superior MT 2235 BLACKFOOT TEL. COOP., INC. 648      

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

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