ftp.maximum.style has no CNAME records.
Question and response
Question
dig ftp.maximum.style. NS
Answer
The response has no answer records.
Authority
maximum.style. 4116 SOA ns1.cloud-46265d.managed-vps.net. admin.maximum.style. 2026022783 86400 7200 2400000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0