shell4.eushells.com has no CNAME records.
Question and response
Question
dig shell4.eushells.com. NS
Answer
The response has no answer records.
Authority
eushells.com. 1280 SOA ns1.dns.services. post.dns.services. 2022021704 10800 3600 1814400 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0