Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇺🇸 N337UP - Boeing 767 34AF/W - United Parcel Service UPS5929/5X5929 - 4.5 mi away @ 39300 ft, heading ESE at 578 mph. Spotted 25x before! [11:23:37 AM CDT] #A3B1A0 #N337UP #B763 #UPS #UPS5929 #5X5929 #ADSB #ADSBbot