adns1.drei.com has no CNAME records.
Question and response
Question
dig adns1.drei.com. NS
Answer
The response has no answer records.
Authority
drei.com. 23 SOA adns3.drei.com. dns.drei.com. 2026020301 10800 3600 2419200 30
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0