spf6.ucdavis.edu has no CNAME records.
Question and response
Question
dig spf6.ucdavis.edu. NS
Answer
The response has no answer records.
Authority
ucdavis.edu. 900 SOA ns0105.secondary.cloudflare.com. netadmin.ucdavis.edu. 118892053 10800 300 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0