Apex domains cannot have CNAME records.
Question and response
Question
dig utah.edu. NS
Answer
utah.edu. 3 NS fiber.utah.edu.
utah.edu. 3 NS ns6.utah.edu.
utah.edu. 3 NS silver.foundationdns.org.
utah.edu. 3 NS silver.foundationdns.net.
utah.edu. 3 NS ns5.utah.edu.
utah.edu. 3 NS ns1.utah.edu.
utah.edu. 3 NS fiber1.utah.edu.
utah.edu. 3 NS silver.foundationdns.com.
utah.edu. 3 NS ns.utah.edu.
Authority
The response has no authority records.
Additional
ns.utah.edu. 3 A 128.110.124.120
ns1.utah.edu. 3 A 155.101.115.10
ns5.utah.edu. 3 A 35.83.221.243
ns6.utah.edu. 3 A 3.20.87.127
fiber.utah.edu. 3 A 128.110.132.99
fiber1.utah.edu. 3 A 155.101.201.10
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0