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: 644

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
320-644 A McGrath MN MPLSMNCDX5X  965H FRACTEL, LLC 628      
320-644 0 McGrath MN MPLSMNCDZMD  073H TELNYX LLC 628   2020-12-25   
320-644 2 McGrath MN MPLSMNCDDSC  184D ONVOY, LLC - MN 628   2021-11-01   
320-644 4 McGrath MN   965H FRACTEL, LLC 628   2020-12-12   
320-644 5 McGrath MN MPLSMNCDDSC  184D ONVOY, LLC - MN 628   2021-05-24   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.