server.febzen.com has no NS records.
NS records for this zone are defined at febzen.com.
NS records for this zone are defined at febzen.com.
Question and response
Question
dig server.febzen.com. NS
Answer
The response has no answer records.
Authority
febzen.com. 1800 SOA megan.ns.cloudflare.com. dns.cloudflare.com. 2399394249 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0