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

🇺🇸 N123NN - Airbus A321 231SL - American Airlines AAL856/AA856, San Francisco (SFO) to Charlotte/Douglas (CLT) - 4.1 mi away @ 32775 ft, heading ESE at 603 mph. Spotted 10x before! [05:56:17 AM CST] #A06010 #N123NN #A321 #AMERICAN #AAL856 #AA856 #ADSB #ADSBbot