shell:$ nslookup -timeout=2 -retry=1 'dldir1.qq.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
dldir1.qq.com	canonical name = dldir1.qq.com.tcdn.qq.com.
dldir1.qq.com.tcdn.qq.com	canonical name = dldir1.qq.com.mid.dcloudstc.com.
dldir1.qq.com.mid.dcloudstc.com	canonical name = dldir1.legodlied1.sched.dcloudstc.com.
Name:	dldir1.legodlied1.sched.dcloudstc.com
Address: 203.205.137.235
Name:	dldir1.legodlied1.sched.dcloudstc.com
Address: 203.205.137.234