b.nic.fm has no CNAME records.
Question and response
Question
dig b.nic.fm. NS
Answer
The response has no answer records.
Authority
nic.fm. 3274 SOA ns1.nic.fm. hostmaster.dot.fm. 2021020225 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0