shell:$ nslookup -timeout=2 -retry=1 'mail.3ghack.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:
mail.3ghack.com	canonical name = mail.qq.com.
Name:	mail.qq.com
Address: 43.135.105.94
Name:	mail.qq.com
Address: 43.129.2.108
mail.qq.com	canonical name = qqmail.wechatos.net.