Apex domains cannot have CNAME records.
Question and response
Question
dig bezeqint.net. NS
Answer
bezeqint.net. 5 NS ns2.bezeqint.net.
bezeqint.net. 5 NS ns3.bezeqint.net.
bezeqint.net. 5 NS ns1.bezeqint.net.
Authority
The response has no authority records.
Additional
ns1.bezeqint.net. 5 A 62.219.128.128
ns2.bezeqint.net. 5 A 212.179.7.7
ns3.bezeqint.net. 5 A 192.115.132.132
ns1.bezeqint.net. 5 AAAA 2001:4cd0:0:0:31:0:0:128
ns2.bezeqint.net. 5 AAAA 2001:4cd0:0:0:11:0:0:7
ns3.bezeqint.net. 5 AAAA 2001:4cd0:0:0:10:0:0:132
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0