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

Non-authoritative answer:
cdnv.ruguoapp.com	canonical name = ga-bp1k4dl0sr8b5njxlsoyu.aliyunga0017.com.
Name:	ga-bp1k4dl0sr8b5njxlsoyu.aliyunga0017.com
Address: 47.242.14.200