shell:$ nslookup -timeout=2 -retry=1 'www.ookla.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
www.ookla.com	canonical name = dualstack.zd.map.fastly.net.
Name:	dualstack.zd.map.fastly.net
Address: 151.101.2.219
Name:	dualstack.zd.map.fastly.net
Address: 151.101.66.219
Name:	dualstack.zd.map.fastly.net
Address: 151.101.130.219
Name:	dualstack.zd.map.fastly.net
Address: 151.101.194.219
Name:	dualstack.zd.map.fastly.net
Address: 2a04:4e42:400::731
Name:	dualstack.zd.map.fastly.net
Address: 2a04:4e42::731
Name:	dualstack.zd.map.fastly.net
Address: 2a04:4e42:600::731
Name:	dualstack.zd.map.fastly.net
Address: 2a04:4e42:200::731