Apex domains cannot have CNAME records.
Question and response
Question
dig ymlp.com. NS
Answer
ymlp.com. 5 NS ns8.ymlp.com.
ymlp.com. 5 NS ns10.ymlp.com.
ymlp.com. 5 NS ns11.ymlp.com.
Authority
The response has no authority records.
Additional
ns8.ymlp.com. 5 A 185.83.49.6
ns10.ymlp.com. 5 A 193.110.251.190
ns11.ymlp.com. 5 A 193.110.251.189
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0