sp.gname.net has no NS records.
NS records for this zone are defined at gname.net.
NS records for this zone are defined at gname.net.
Question and response
Question
dig sp.gname.net. NS
Answer
The response has no answer records.
Authority
gname.net. 1800 SOA anita.ns.cloudflare.com. dns.cloudflare.com. 2395169168 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0