lists.flaresystems.org has no CNAME records.
Question and response
Question
dig lists.flaresystems.org. NS
Answer
The response has no answer records.
Authority
flaresystems.org. 1580 SOA arnold.ns.cloudflare.com. dns.cloudflare.com. 2396338968 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0