Apex domains cannot have CNAME records.
Question and response
Question
dig wm.net. NS
Answer
wm.net. 5 NS ns1.imgmt.net.
wm.net. 5 NS ns.imgmt.net.
wm.net. 5 NS ns.wm.net.
wm.net. 5 NS ns2.wm.net.
wm.net. 5 NS nsp.dnsnode.net.
wm.net. 5 NS ns6.wm.net.
wm.net. 5 NS ns1.wm.net.
wm.net. 5 NS ns2.imgmt.net.
Authority
The response has no authority records.
Additional
ns.wm.net. 5 A 85.119.128.52
ns.imgmt.net. 5 A 85.119.128.54
ns1.wm.net. 5 A 85.119.128.60
ns1.imgmt.net. 5 A 85.119.128.62
ns2.wm.net. 5 A 85.119.128.68
ns2.imgmt.net. 5 A 85.119.128.70
ns6.wm.net. 5 A 159.72.128.18
ns.wm.net. 5 AAAA 2a02:c58:4:0:d175:0:0:100
ns.imgmt.net. 5 AAAA 2a02:c58:4:0:d175:0:0:200
ns1.wm.net. 5 AAAA 2a02:c58:4:1:d175:0:0:100
ns1.imgmt.net. 5 AAAA 2a02:c58:4:1:d175:0:0:200
ns2.wm.net. 5 AAAA 2a02:c58:4:2:d175:0:0:100
ns2.imgmt.net. 5 AAAA 2a02:c58:4:2:d175:0:0:200
ns6.wm.net. 5 AAAA 2a02:c58:6:53:d175:0:0:100
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0