shell:$ nslookup -timeout=2 -retry=1 'oth.str.mdt.qq.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:
oth.str.mdt.qq.com	canonical name = ins-x9e4tvue.ias.tencent-cloud.net.
Name:	ins-x9e4tvue.ias.tencent-cloud.net
Address: 101.32.212.174
Name:	ins-x9e4tvue.ias.tencent-cloud.net
Address: 43.129.255.160