shell:$ nslookup -timeout=2 -retry=1 'speedtest.rcell.me.prod.hosts.ooklaserver.net'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
speedtest.rcell.me.prod.hosts.ooklaserver.net	canonical name = speedtest.rcell.me.
Name:	speedtest.rcell.me
Address: 185.255.47.116