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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Audubon, MN

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
218-439 A ADBNMNXARS1  1443 LORETEL SYSTEMS, INC. 636      
218-439 0   1443 LORETEL SYSTEMS, INC. 636      
218-439 1   429A MIDCONTINENT COMMUNICATIONS - MN 636   2021-06-21   
218-439 2   1443 LORETEL SYSTEMS, INC. 636      
218-439 3   1443 LORETEL SYSTEMS, INC. 636      
218-439 4   1443 LORETEL SYSTEMS, INC. 636      
218-439 5   1443 LORETEL SYSTEMS, INC. 636      
218-439 6   1443 LORETEL SYSTEMS, INC. 636      
218-439 7   1443 LORETEL SYSTEMS, INC. 636      
218-439 8   1443 LORETEL SYSTEMS, INC. 636      
218-439 9   1443 LORETEL SYSTEMS, INC. 636      

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

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