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.

NPA: 320 [Rate centres in NPA 320] [Dial plan for NPA 320]

NXX: 620

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
320-620 A Glencoe MN OSSEMNXOMMD  184D ONVOY, LLC - MN 628      
320-620 0 Glencoe MN GLVYMNORZMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 628   2023-10-14   
320-620 1 Glencoe MN GLVYMNORZMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 628   2023-10-14   
320-620 6 Glencoe MN OSSEMNXOMMD  184D ONVOY, LLC - MN 628   2022-11-16   
320-620 7 Glencoe MN OSSEMNXOMMD  184D ONVOY, LLC - MN 628   2022-11-16   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.