mail.nice-denim.com has no NS records.
NS records for this zone are defined at nice-denim.com.
NS records for this zone are defined at nice-denim.com.
Question and response
Question
dig mail.nice-denim.com. NS
Answer
The response has no answer records.
Authority
nice-denim.com. 1800 SOA alan.ns.cloudflare.com. dns.cloudflare.com. 2397282915 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0