f.hu has no CNAME records.
Question and response
Question
dig f.hu. NS
Answer
The response has no answer records.
Authority
hu. 453 SOA a.hu. hostmaster.nic.hu. 1772086844 3600 900 259200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0