mx.healtheweb.co.uk has no NS records.
NS records for this zone are defined at healtheweb.co.uk.
NS records for this zone are defined at healtheweb.co.uk.
Question and response
Question
dig mx.healtheweb.co.uk. NS
Answer
The response has no answer records.
Authority
healtheweb.co.uk. 1800 SOA ruth.ns.cloudflare.com. dns.cloudflare.com. 2398667723 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0