unknown NS records

NS Authoritative DNS server
1d
unknown has no NS records.
NS records for this zone are defined at unknown..
trace unknown NS records for unknown.

Question and response

Question

dig unknown. NS

Answer

The response has no answer records.

Authority

. 86400 SOA a.root-servers.net. nstld.verisign-grs.com. 2026031100 1800 900 604800 86400

Additional

. 0 OPT ; payload 1450, xrcode 0, version 0, flags 0