Apex domains cannot have CNAME records.
Question and response
Question
dig ilan.net.il. NS
Answer
ilan.net.il. 5 NS iuccdns.bgu.ac.il.
ilan.net.il. 5 NS mdns.iucc.ac.il.
ilan.net.il. 5 NS sdns.iucc.ac.il.
ilan.net.il. 5 NS med1dns.iucc.ac.il.
Authority
The response has no authority records.
Additional
mdns.iucc.ac.il. 5 A 128.139.197.10
sdns.iucc.ac.il. 5 A 128.139.197.11
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0