shell:$ nslookup -timeout=2 -retry=1 'www.opt.nc'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
www.opt.nc	canonical name = vip-rproxy.opt.nc.
Name:	vip-rproxy.opt.nc
Address: 202.87.129.164
Name:	vip-rproxy.opt.nc
Address: 202.87.129.166
Name:	vip-rproxy.opt.nc
Address: 2404:2200:10:1002:202:87:129:163
Name:	vip-rproxy.opt.nc
Address: 2404:2200:10:1002:202:87:129:165