relay.grnet.gr has no CNAME records.
Question and response
Question
dig relay.grnet.gr. NS
Answer
The response has no answer records.
Authority
grnet.gr. 445 SOA ns-pri.grnet.gr. dnsmgr.grnet.gr. 2026022407 86400 7200 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0