s.ns33.intelsrv.net has no NS records.
NS records for this zone are defined at intelsrv.net.
NS records for this zone are defined at intelsrv.net.
Question and response
Question
dig s.ns33.intelsrv.net. NS
Answer
The response has no answer records.
Authority
intelsrv.net. 1800 SOA deb.ns.cloudflare.com. dns.cloudflare.com. 2396919035 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0