mail.utterfly.co.uk has no NS records.
NS records for this zone are defined at utterfly.co.uk.
NS records for this zone are defined at utterfly.co.uk.
Question and response
Question
dig mail.utterfly.co.uk. NS
Answer
The response has no answer records.
Authority
utterfly.co.uk. 1800 SOA carl.ns.cloudflare.com. dns.cloudflare.com. 2396916953 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0