mx0.grnet.gr has no NS records.
NS records for this zone are defined at grnet.gr.
NS records for this zone are defined at grnet.gr.
Question and response
Question
dig mx0.grnet.gr. NS
Answer
The response has no answer records.
Authority
grnet.gr. 600 SOA ns-pri.grnet.gr. dnsmgr.grnet.gr. 2026021805 86400 7200 604800 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0