Apex domains cannot have CNAME records.
Question and response
Question
dig cellcom.co.il. NS
Answer
cellcom.co.il. 4 NS nypop.netvision.net.il.
cellcom.co.il. 4 NS dns.netvision.net.il.
Authority
The response has no authority records.
Additional
dns.netvision.net.il. 4 A 194.90.1.5
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0