Apex domains cannot have CNAME records.
Question and response
Question
dig media. NS
Answer
media. 5 NS v0n0.nic.media.
media. 5 NS v0n2.nic.media.
media. 5 NS v2n0.nic.media.
media. 5 NS v0n3.nic.media.
media. 5 NS v0n1.nic.media.
media. 5 NS v2n1.nic.media.
Authority
The response has no authority records.
Additional
v0n0.nic.media. 154289 A 65.22.20.3
v0n1.nic.media. 154289 A 65.22.21.3
v0n2.nic.media. 154289 A 65.22.22.3
v0n3.nic.media. 154289 A 161.232.10.3
v2n0.nic.media. 154289 A 65.22.23.3
v2n1.nic.media. 154289 A 161.232.11.3
v0n0.nic.media. 154289 AAAA 2a01:8840:16:0:0:0:0:3
v0n1.nic.media. 154289 AAAA 2a01:8840:17:0:0:0:0:3
v0n2.nic.media. 154289 AAAA 2a01:8840:18:0:0:0:0:3
v0n3.nic.media. 154289 AAAA 2a01:8840:f4:0:0:0:0:3
v2n0.nic.media. 154289 AAAA 2a01:8840:19:0:0:0:0:3
v2n1.nic.media. 154289 AAAA 2a01:8840:f5:0:0:0:0:3
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0