Apex domains cannot have CNAME records.
Question and response
Question
dig telfy.com. NS
Answer
telfy.com. 4 NS ns1.telfy.com.
telfy.com. 4 NS ns2.telfy.com.
Authority
The response has no authority records.
Additional
ns1.telfy.com. 4 A 88.148.8.4
ns2.telfy.com. 4 A 88.148.8.2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0