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

🇺🇸 N221NN - Embraer EMB-175 LR - American Eagle ENY4188/MQ4188, Dallas-Fort Worth (DFW) to Appleton (ATW) - 4.3 mi away @ 37325 ft, heading NE at 556 mph. Spotted 31x before! [08:29:04 PM CDT] #A1E5F1 #N221NN #E75L #ENVOY #ENY4188 #MQ4188 #autopilot #ADSB #ADSBbot