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.

Black Earth, WI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
608-767 A BLERWIXARP0  0849 BLACK EARTH TEL. CO. 354      
608-767 0   0849 BLACK EARTH TEL. CO. 354      
608-767 1   0849 BLACK EARTH TEL. CO. 354      
608-767 2   0849 BLACK EARTH TEL. CO. 354      
608-767 3   0849 BLACK EARTH TEL. CO. 354      
608-767 4   0849 BLACK EARTH TEL. CO. 354      
608-767 6   516J TON80 COMMUNICATIONS, LLC 354   2021-08-29   
608-767 7   145J TERRA NOVA TELECOM INC. 354   2025-08-07   
608-813 A   792K CHARTER IP ENABLED SERVICES, LLC 354      
608-813 1   792K CHARTER IP ENABLED SERVICES, LLC 354   2010-03-01   
608-813 2   225C ONVOY, LLC - WI 354   2021-07-25   
608-813 3   225C ONVOY, LLC - WI 354   2021-04-04   
608-813 4   624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-813 6   7216 TELEPORT COMMUNICATIONS AMERICA, LLC WI 354   2020-03-29   
608-813 7   508J CENTURYLINK COMMUNICATIONS, LLC 354   2017-10-24   
608-813 8   225C ONVOY, LLC - WI 354   2020-01-06   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.