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: ROCHMNROTMD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
507-936 0 Lakefield MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 620      
507-939 4 Hokah MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 620   2022-02-21   
507-944 9 Stewartville MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 620   2022-03-27   
507-955 4 Mapleton MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 620   2022-02-21   
507-961 2 Winona MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 620   2012-06-24   
605-349 7 West Jasper SD 5180 LEVEL 3 COMMUNICATIONS, LLC - SD 620   2017-05-18   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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