mail.securesignup.net has no NS records.
NS records for this zone are defined at securesignup.net.
NS records for this zone are defined at securesignup.net.
Question and response
Question
dig mail.securesignup.net. NS
Answer
The response has no answer records.
Authority
securesignup.net. 1800 SOA andy.ns.cloudflare.com. dns.cloudflare.com. 2397309623 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0