srv5.fused.com has no NS records.
NS records for this zone are defined at fused.com.
NS records for this zone are defined at fused.com.
Question and response
Question
dig srv5.fused.com. NS
Answer
The response has no answer records.
Authority
fused.com. 1800 SOA fred.ns.cloudflare.com. dns.cloudflare.com. 2396888965 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0