ns.reality-dns.com has no CNAME records.
Question and response
Question
dig ns.reality-dns.com. NS
Answer
The response has no answer records.
Authority
reality-dns.com. 6604 SOA ns.reality-dns.com. dns.reality-dns.com. 2018121001 28800 3600 604800 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0