Back in July another Ukrainian An12 routed overhead me and London City at FL 210 on a fine summer evening, audible, so I looked up, and visible (in fact glinting in the sun), which was actually flying Plovdiv, Bulgaria - Frankfurt Hahn - Shannon - St Johns Nfld - Greenville SC - Houston Tx. Now that's quite a run for one of these old girls to make.
Hahn to Greenville was likely BMW car parts, their US assembly plant is at the latter. Houston for an onward oil industry charter.
They appeared to only make one short night stop, at Shannon, and by its sound the prop synchronisers are no longer perfect. Crew must have been knackered. 30 hours end to end.