shell:$ nslookup -timeout=2 -retry=1 'www.swi-prolog.org'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
www.swi-prolog.org	canonical name = dualstack.osff2.map.fastly.net.
Name:	dualstack.osff2.map.fastly.net
Address: 146.75.10.217
Name:	dualstack.osff2.map.fastly.net
Address: 2a04:4e42:72::729