There was time when WBZ was easily heard in Oklahoma, but it’s difficult now. When I was stationed at Beale AFB CA in 1969, it wasn’t unusual to hear WBZ, as well as WABC, WCBS, WNBC and most of the eastern clears. I use to listen to KOMA most nights. Then the FCC started screwing things up and now it’s mostly a log jam.
I have heard WBZ and WABC a couple of times this winter albeit briefly.