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

🇺🇸 N400AN - Airbus A321 253NXSL - American Airlines AAL2938/AA2938, Newark Liberty (EWR) to Phoenix Sky Harbor (PHX) - 4.1 mi away @ 34700 ft, heading W at 508 mph. Spotted 15x before. [07:44:39 AM CST] #A4ACAE #N400AN #A21N #AMERICAN #AAL2938 #AA2938 #ADSB #ADSBbot