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: STCDMNTOX0X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
320-244 A Grove City MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626      
320-270 A Holmes City MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626      
320-281 A St Cloud MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626      
320-310 A St Cloud MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626      
320-315 A Granite Falls MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626      
320-338 A Granite Falls MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626      
320-357 A Long Prairie MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626      
320-377 A Grove City MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626      
320-421 A Alexandria MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626      
320-432 A Holmes City MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626      
320-433 A St Joseph MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626      
320-434 A Litchfield MN 5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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