f.dns.md has no CNAME records.
Question and response
Question
dig f.dns.md. NS
Answer
The response has no answer records.
Authority
dns.md. 3250 SOA ns.dns.md. master.dns.md. 2026022422 43200 3600 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0