ns01.hkdns.host has no NS records.
NS records for this zone are defined at hkdns.host.
NS records for this zone are defined at hkdns.host.
Question and response
Question
dig ns01.hkdns.host. NS
Answer
The response has no answer records.
Authority
hkdns.host. 600 SOA hydrogen.ns.hetzner.com. dns.hetzner.com. 2026020800 86400 3600 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0