ns1.gastuna.com has no CNAME records.
Question and response
Question
dig ns1.gastuna.com. NS
Answer
The response has no answer records.
Authority
gastuna.com. 8986 SOA ns1.gastuna.com. hostmaster.gastuna.com. 2025092617 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0