Apex domains cannot have CNAME records.
Question and response
Question
dig globnix.net. NS
Answer
globnix.net. 5 NS ns0.firedrake.org.
globnix.net. 5 NS rip.psg.com.
globnix.net. 5 NS nlns.globnix.net.
globnix.net. 5 NS us1ns.pennock-tech.net.
Authority
The response has no authority records.
Additional
ns0.firedrake.org. 5 A 212.110.173.52
rip.psg.com. 5 A 147.28.0.39
nlns.globnix.net. 5 A 94.142.241.91
us1ns.pennock-tech.net. 5 A 159.203.114.39
ns0.firedrake.org. 5 AAAA 2001:41c9:1:404:0:0:0:52
rip.psg.com. 5 AAAA 2001:418:1:0:0:0:0:39
nlns.globnix.net. 5 AAAA 2a02:898:31:0:0:0:53:0
us1ns.pennock-tech.net. 5 AAAA 2604:a880:800:a1:0:0:419:1001
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0