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

🇺🇸 N643AZ - Boeing 767 332ERBDSF/W - Prime Air ATN6744/8C6744 - 5.3 mi away @ 42550 ft, heading E at 561 mph. Spotted 3x before! [03:10:58 PM CDT] #A87078 #N643AZ #B763 #AIR_TRANSPORT #ATN6744 #8C6744 #ADSB #ADSBbot