smtpcluster007de-alpha.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 smtpcluster007de-alpha.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