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

🇦🇿 4K-BBH - Boeing 747 83QF - Silk Way West Airlines AZG5721/7L5721, Keflavik (KEF) to Santa Lucia Air Force Base (NLU) - 3.8 mi away @ 31350 ft, heading SSW at 537 mph. Spotted once before! [03:11:53 AM CST] #600B26 #4K_BBH #B748 #SILK_WEST #AZG5721 #7L5721 #ADSB #ADSBbot