shell:$ nslookup -timeout=2 -retry=1 'imgcache.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:
imgcache.qq.com	canonical name = luna-imgcache.qq.com.tcdn.qq.com.
luna-imgcache.qq.com.tcdn.qq.com	canonical name = imgcache.qq.com.sched.legopic1.tdnsv6.com.
Name:	imgcache.qq.com.sched.legopic1.tdnsv6.com
Address: 101.72.192.67
Name:	imgcache.qq.com.sched.legopic1.tdnsv6.com
Address: 122.190.64.57
Name:	imgcache.qq.com.sched.legopic1.tdnsv6.com
Address: 59.83.212.232
Name:	imgcache.qq.com.sched.legopic1.tdnsv6.com
Address: 116.162.186.182
Name:	imgcache.qq.com.sched.legopic1.tdnsv6.com
Address: 221.204.15.59
Name:	imgcache.qq.com.sched.legopic1.tdnsv6.com
Address: 221.204.15.61