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: 307

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
320-307 A Braham MN MPLSMNCDDSC  184D ONVOY, LLC - MN 628      
320-307 0 Braham MN MPLSMNDTXRX  980E BANDWIDTH.COM CLEC, LLC - MN 628   2012-08-12   
320-307 1 Braham MN MPLSMNCDDSC  184D ONVOY, LLC - MN 628   2012-09-25   
320-307 3 Braham MN MPLSMNCDDSC  184D ONVOY, LLC - MN 628   2012-11-30   
320-307 4 Braham MN MPLSMNCDDSC  184D ONVOY, LLC - MN 628   2012-11-30   
320-307 5 Braham MN MPLSMNCDDSC  184D ONVOY, LLC - MN 628   2012-11-30   
320-307 6 Braham MN MPLSMNCDDSF  107F PEERLESS NETWORK OF MINNESOTA, LLC - MN 628   2013-05-03   
320-307 7 Braham MN MPLSMNCDDSF  107F PEERLESS NETWORK OF MINNESOTA, LLC - MN 628   2013-05-03   
320-307 8 Braham MN MPLSMNCDDSC  184D ONVOY, LLC - MN 628   2014-10-07   
320-307 9 Braham MN MPLSMNCDDSC  184D ONVOY, LLC - MN 628   2014-10-07   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.