shell:$ nslookup -timeout=2 -retry=1 'push-rtmp-f5.tiktokcdn.com.c.worldfcdn.com'
;; communications error to 75.98.161.224#53: timed out
Server:		69.39.86.5
Address:	69.39.86.5#53

Non-authoritative answer:
push-rtmp-f5.tiktokcdn.com.c.worldfcdn.com	canonical name = push-fcdn-base-oversea.s.worldfcdn.com.
push-fcdn-base-oversea.s.worldfcdn.com	canonical name = push-graveyard.s.bytefcdn-oversea.com.
Name:	push-graveyard.s.bytefcdn-oversea.com
Address: 128.14.102.202