Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 320 [Rate centres in NPA 320] [Dial plan for NPA 320]

NXX: 999

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
320-999 A Sandstone MN MPLSMNCDX4X  145J TERRA NOVA TELECOM INC. 628      
320-999 0 Sandstone MN   184D ONVOY, LLC - MN 628   2019-03-19   
320-999 1 Sandstone MN   184D ONVOY, LLC - MN 628   2019-03-19   
320-999 2 Sandstone MN   980E BANDWIDTH.COM CLEC, LLC - MN 628   2019-06-14   
320-999 3 Sandstone MN   980E BANDWIDTH.COM CLEC, LLC - MN 628   2019-07-26   
320-999 4 Sandstone MN   107F PEERLESS NETWORK OF MINNESOTA, LLC - MN 628   2019-10-25   
320-999 5 Sandstone MN   184D ONVOY, LLC - MN 628   2020-11-07   
320-999 6 Sandstone MN   8405 TELEPORT COMMUNICATIONS AMERICA, LLC - MN 628   2020-06-26   
320-999 7 Sandstone MN   184D ONVOY, LLC - MN 628   2020-11-07   
320-999 9 Sandstone MN   145J TERRA NOVA TELECOM INC. 628   2019-03-18   

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

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