wiki.orpheusnet.co.uk has no NS records.
NS records for this zone are defined at orpheusnet.co.uk.
NS records for this zone are defined at orpheusnet.co.uk.
Question and response
Question
dig myh.prod.cluster1.my-hosts.net. NS
Answer
The response has no answer records.
Authority
my-hosts.net. 900 SOA ns-497.awsdns-62.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0