ntp.exact-time.org has no CNAME records.
Question and response
Question
dig ntp.exact-time.org. NS
Answer
The response has no answer records.
Authority
exact-time.org. 9565 SOA ns1.ukraine-domain.com. hostmaster.ukraine-domain.com. 2025033101 14400 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0