mail.kitone.org has no NS records.
NS records for this zone are defined at kitone.org.
NS records for this zone are defined at kitone.org.
Question and response
Question
dig mail.kitone.org. NS
Answer
The response has no answer records.
Authority
kitone.org. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1773496150 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0