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

🇺🇸 N257AZ - Boeing 767 323ERBDSF/W - Prime Air ATN4328/8C4328, Kansas City (MCI) to Cincinnati/Northern Kentucky (CVG) - 4.2 mi away @ 37800 ft, heading ESE at 638 mph. Spotted 21x before! [04:50:28 AM CST] #A27197 #N257AZ #B763 #AIR_TRANSPORT #ATN4328 #8C4328 #ADSB #ADSBbot