shell:$ nslookup -timeout=2 -retry=1 'open.speedtest.net.speedtestnet.ggff.net'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	open.speedtest.net.speedtestnet.ggff.net
Address: 104.21.53.201
Name:	open.speedtest.net.speedtestnet.ggff.net
Address: 172.67.218.123
Name:	open.speedtest.net.speedtestnet.ggff.net
Address: 2606:4700:3037::6815:35c9
Name:	open.speedtest.net.speedtestnet.ggff.net
Address: 2606:4700:3030::ac43:da7b