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: OSSEMNXODMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
320-331 A Brownton MN 593K MCC TELEPHONY LLC 628      
320-389 A Buffalo Lake MN 593K MCC TELEPHONY LLC 628      
320-446 A Stewart MN 593K MCC TELEPHONY LLC 628      
320-613 A Lester Prairie MN 593K MCC TELEPHONY LLC 628      
320-753 A Silver Lake MN 593K MCC TELEPHONY LLC 628      

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

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