shell:$ nslookup -timeout=2 -retry=1 'a.nel.cludflare.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
a.nel.cludflare.com	canonical name = 591565.parkingcrew.net.
Name:	591565.parkingcrew.net
Address: 185.53.179.200