mail.ntstime.org has no NS records.
NS records for this zone are defined at ntstime.org.
NS records for this zone are defined at ntstime.org.
Question and response
Question
dig mail.ntstime.org. NS
Answer
The response has no answer records.
Authority
ntstime.org. 86400 SOA root-dns.netcup.net. dnsadmin.netcup.net. 2024102203 28800 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0