Apex domains cannot have CNAME records.
Question and response
Question
dig ebusinessbe.com. NS
Answer
ebusinessbe.com. 5 NS ns1.ebusiness.be.
ebusinessbe.com. 5 NS ns3.eb.be.
ebusinessbe.com. 5 NS ns2.e-business.be.
ebusinessbe.com. 5 NS ns4.ebusinessbe.com.
Authority
The response has no authority records.
Additional
ns1.ebusiness.be. 5 A 91.198.26.14
ns2.e-business.be. 5 A 91.198.26.11
ns3.eb.be. 5 A 91.198.26.101
ns4.ebusinessbe.com. 5 A 178.32.40.251
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0