Apex domains cannot have CNAME records.
Question and response
Question
dig 036.ch. NS
Answer
036.ch. 5 NS ns3.036.ch.
036.ch. 5 NS ns5.036.ch.
036.ch. 5 NS ns4.036.ch.
Authority
The response has no authority records.
Additional
ns3.036.ch. 5 A 91.135.65.196
ns4.036.ch. 5 A 91.135.68.196
ns5.036.ch. 5 A 47.86.27.182
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0