mail.fastval.co.uk has no NS records.
NS records for this zone are defined at fastval.co.uk.
NS records for this zone are defined at fastval.co.uk.
Question and response
Question
dig mail.fastval.co.uk. NS
Answer
The response has no answer records.
Authority
fastval.co.uk. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1774135093 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0