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: DVLKND13GT0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
701-233 A Starkweather ND 3065 MIDCONTINENT COMMUNICATIONS - ND 636      
701-544 A Devils Lake ND 3065 MIDCONTINENT COMMUNICATIONS - ND 636      
701-686 A Langdon ND 3065 MIDCONTINENT COMMUNICATIONS - ND 636      
701-821 A Walhalla ND 3065 MIDCONTINENT COMMUNICATIONS - ND 636      
701-972 A New Rockford ND 3065 MIDCONTINENT COMMUNICATIONS - ND 636      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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