Apex domains cannot have CNAME records.
Question and response
Question
dig adderglobal.com. NS
Answer
adderglobal.com. 5 NS ns3.adderglobal.com.
adderglobal.com. 5 NS ns1.adderglobal.com.
adderglobal.com. 5 NS ns2.adderglobal.com.
Authority
The response has no authority records.
Additional
ns1.adderglobal.com. 5 A 185.31.23.57
ns2.adderglobal.com. 5 A 185.31.22.177
ns3.adderglobal.com. 5 A 54.212.107.84
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0