mail.howandanswer.com has no NS records.
NS records for this zone are defined at howandanswer.com.
NS records for this zone are defined at howandanswer.com.
Question and response
Question
dig mail.howandanswer.com. NS
Answer
The response has no answer records.
Authority
howandanswer.com. 1800 SOA neil.ns.cloudflare.com. dns.cloudflare.com. 2396541358 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0