python.dmpriest.net.uk has no CNAME records.
Question and response
Question
dig python.dmpriest.net.uk. NS
Answer
The response has no answer records.
Authority
dmpriest.net.uk. 10787 SOA ns0.dmpriest.net.uk. root.dmpriest.com. 2026011901 7200 3600 2419200 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0