Apex domains cannot have CNAME records.
Question and response
Question
dig tele.net. NS
Answer
tele.net. 5 NS ns.tele.net.
tele.net. 5 NS ns-too.tele.net.
Authority
The response has no authority records.
Additional
ns.tele.net. 5 A 194.183.128.35
ns-too.tele.net. 5 A 194.183.128.36
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0