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

🇺🇸 N947NN - Boeing 737NG 823/W - American Airlines AAL1553/AA1553 (DFW-LGA-DFW) - 4.1 mi away @ 36925 ft, heading NE at 637 mph. Spotted 29x before! [02:48:26 PM CST] #AD2862 #N947NN #B738 #AMERICAN #AAL1553 #AA1553 #ADSB #ADSBbot