ns.data.ee has no CNAME records.
Question and response
Question
dig ns.data.ee. NS
Answer
The response has no answer records.
Authority
data.ee. 438 SOA ns.eunet.ee. hostmaster.eunet.ee. 2025100700 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0