The "original" MARCS 3600 has been down for some time now, replaced entirely with MARCS-IP.
The Toledo Edison UHF frequencies are no longer active, since they have switched to using MARCS-IP full-time. The TE talk groups are listed in the RR Database under First Energy-Toledo Edison.
The ones that are active in the area where I listen (Wood County) are:
53765 Holland DCC
53766 Lakewood DCC
53767 Lindsey DCC
53768 Wauseon DCC
They have other talk groups but in my area I don't hear them as being very active--in other words, rarely.