shell:$ nslookup -timeout=2 -retry=1 'cdn.wetest.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:
cdn.wetest.qq.com	canonical name = cdn.wetest.qq.com.cloud.tc.qq.com.
cdn.wetest.qq.com.cloud.tc.qq.com	canonical name = cdn.wetest.qq.com.sched.legopic2.tdnsv6.com.
Name:	cdn.wetest.qq.com.sched.legopic2.tdnsv6.com
Address: 203.205.136.219
Name:	cdn.wetest.qq.com.sched.legopic2.tdnsv6.com
Address: 203.205.137.228
Name:	cdn.wetest.qq.com.sched.legopic2.tdnsv6.com
Address: 203.205.137.101
Name:	cdn.wetest.qq.com.sched.legopic2.tdnsv6.com
Address: 203.205.137.57
Name:	cdn.wetest.qq.com.sched.legopic2.tdnsv6.com
Address: 203.205.137.181
Name:	cdn.wetest.qq.com.sched.legopic2.tdnsv6.com
Address: 203.205.137.231