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

Non-authoritative answer:
whois.cloudflare.com	canonical name = rdap.pacloudflare.com.
rdap.pacloudflare.com	canonical name = 0618150fe8904e9eb8e1897fc41883ac.pacloudflare.com.
Name:	0618150fe8904e9eb8e1897fc41883ac.pacloudflare.com
Address: 172.65.6.77
Name:	0618150fe8904e9eb8e1897fc41883ac.pacloudflare.com
Address: 2606:4700:60:0:2e9:a71:b50c:b9c