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: 218 [Rate centres in NPA 218] [Dial plan for NPA 218]

NXX: 231

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
218-231 A Hibbing MN DLTHMNMEX7X  184D ONVOY, LLC - MN 624      
218-231 0 Hibbing MN   184D ONVOY, LLC - MN 624   2019-06-21   
218-231 1 Hibbing MN   980E BANDWIDTH.COM CLEC, LLC - MN 624   2011-06-02   
218-231 2 Hibbing MN   9631 QWEST CORPORATION 624   2007-08-07   
218-231 3 Hibbing MN   4814 PAUL BUNYAN RURAL TELEPHONE COOP. 624   2016-10-26   
218-231 4 Hibbing MN   184D ONVOY, LLC - MN 624   2019-05-05   
218-231 5 Hibbing MN   184D ONVOY, LLC - MN 624   2019-05-05   
218-231 6 Hibbing MN   184D ONVOY, LLC - MN 624   2019-06-21   
218-231 7 Hibbing MN   508J CENTURYLINK COMMUNICATIONS, LLC 624   2016-01-15   
218-231 8 Hibbing MN   184D ONVOY, LLC - MN 624   2003-11-15   
218-231 9 Hibbing MN   184D ONVOY, LLC - MN 624   2020-01-29   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.