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

🇺🇸 N459AN - Airbus A321 253NXSL - American Airlines AAL400/AA400, San Francisco (SFO) to Philadelphia (PHL) - 4.0 mi away @ 34400 ft, heading E at 634 mph. Spotted 13x before! [04:50:51 PM CST] #A59398 #N459AN #A21N #AMERICAN #AAL400 #AA400 #ADSB #ADSBbot