shell:$ nslookup -timeout=2 -retry=1 'wan.video'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
wan.video	canonical name = ga-bp11a19c34cp53kskrcaw.aliyunga0017.com.
Name:	ga-bp11a19c34cp53kskrcaw.aliyunga0017.com
Address: 47.251.249.221
Name:	ga-bp11a19c34cp53kskrcaw.aliyunga0017.com
Address: 47.251.248.246