Since WBUP cannot be seen over-the-air in the Keweenaw Peninsula, it is simulcast on WBKP's second digital subchannel (5.2) from a transmitter on Tolonen Hill near Painesdale of Adams Township.

Since the merger of the three stations, WJMN has also simulcast WBUP and WBKP on its first and second digital subchannels, giving it UHF coverage in the eastern Upper Peninsula and Escanaba.

In August 1997, the area's original ABC affiliate WBKP launched repeater station W28BX on channel 28 in Marquette to cover the city proper.

On February 11, 2013, at about 8:35 p.m., WBUP became a victim of broadcast signal intrusion when an unidentified hacker had hijacked the Emergency Alert System network to transmit a false EAS message.

The attack also happened during prime time programming locally on WNMU-TV, KENW in Portales, New Mexico, and KRTV in Great Falls, Montana.

In September 2023, it was announced that The Marks Group would sell its Michigan broadcasting properties—WBUP, WBKP, WBKB-TV, and radio stations in Houghton and Iron River—to Morgan Murphy Media for $13.375 million.

It then began offering a standard definition simulcast of WBKP on a new second digital subchannel in order to expand that station's broadcasting radius.