shell:$ nslookup -timeout=2 -retry=1 'a.nel.cloudflare.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	a.nel.cloudflare.com
Address: 35.190.80.1
Name:	a.nel.cloudflare.com
Address: 2600:1901:0:47fc::