mail.bigscoots.com has no NS records.
NS records for this zone are defined at bigscoots.com.
NS records for this zone are defined at bigscoots.com.
Question and response
Question
dig mail.bigscoots.com. NS
Answer
The response has no answer records.
Authority
bigscoots.com. 1800 SOA cloe.ns.cloudflare.com. dns.cloudflare.com. 2398580809 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0