clients.openitc.co.uk has no CNAME records.
Question and response
Question
dig clients.openitc.co.uk. NS
Answer
The response has no answer records.
Authority
openitc.co.uk. 3600 SOA ns1.openitc.net. admin.openitc.net. 2026012009 86400 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0