Apex domains cannot have CNAME records.
Question and response
Question
dig alshamil.net.ae. NS
Answer
alshamil.net.ae. 5 NS ns3.etisalatdomains.ae.
alshamil.net.ae. 5 NS ns2.etisalatdomains.ae.
alshamil.net.ae. 5 NS ns1.etisalatdomains.ae.
alshamil.net.ae. 5 NS ns4.etisalatdomains.ae.
Authority
The response has no authority records.
Additional
ns1.etisalatdomains.ae. 5 A 5.195.168.51
ns2.etisalatdomains.ae. 5 A 5.195.168.53
ns3.etisalatdomains.ae. 5 A 5.195.168.54
ns4.etisalatdomains.ae. 5 A 5.195.168.55
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0