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

Non-authoritative answer:
auth.speedtest.net	canonical name = ookla-cd-w44abs0x74jyn07l.edge.tenants.auth0.com.
Name:	ookla-cd-w44abs0x74jyn07l.edge.tenants.auth0.com
Address: 104.18.37.18
Name:	ookla-cd-w44abs0x74jyn07l.edge.tenants.auth0.com
Address: 172.64.150.238
Name:	ookla-cd-w44abs0x74jyn07l.edge.tenants.auth0.com
Address: 2606:4700:4403::ac40:96ee
Name:	ookla-cd-w44abs0x74jyn07l.edge.tenants.auth0.com
Address: 2a06:98c1:3101::6812:2512