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

Non-authoritative answer:
Name:	a-staging.nel.cloudflare.com
Address: 34.120.254.28
Name:	a-staging.nel.cloudflare.com
Address: 2600:1901:0:b5ed::