it01.svrsh.com has no NS records.
NS records for this zone are defined at svrsh.com.
NS records for this zone are defined at svrsh.com.
Question and response
Question
dig it01.svrsh.com. NS
Answer
The response has no answer records.
Authority
svrsh.com. 1800 SOA glen.ns.cloudflare.com. dns.cloudflare.com. 2398655487 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0