d.ns.ie has no CNAME records.
Question and response
Question
dig d.ns.ie. NS
Answer
The response has no answer records.
Authority
ns.ie. 3600 SOA a.ns.ie. noc.weare.ie. 2026030601 14400 3600 2600000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0