Apex domains cannot have CNAME records.
Question and response
Question
dig lwldns.com. NS
Answer
lwldns.com. 5 NS ns02.lwldns.de.
lwldns.com. 5 NS ns05.lwldns.com.
lwldns.com. 5 NS ns04.lwldns.com.
lwldns.com. 5 NS ns01.lwldns.de.
lwldns.com. 5 NS ns03.lwldns.de.
Authority
The response has no authority records.
Additional
ns01.lwldns.de. 5 A 193.46.233.7
ns02.lwldns.de. 5 A 193.46.233.6
ns03.lwldns.de. 5 A 193.46.233.5
ns04.lwldns.com. 5 A 193.46.233.4
ns05.lwldns.com. 5 A 193.46.233.3
ns01.lwldns.de. 5 AAAA 2a00:c380:c110:3c1:0:0:0:37
ns02.lwldns.de. 5 AAAA 2a00:c380:c110:3c1:0:0:0:36
ns03.lwldns.de. 5 AAAA 2a00:c380:c110:3c1:0:0:0:35
ns04.lwldns.com. 5 AAAA 2a00:c380:c110:3c1:0:0:0:34
ns05.lwldns.com. 5 AAAA 2a00:c380:c110:3c1:0:0:0:33
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0