ip03.mg.infinitecampus.org has no CNAME records.
Question and response
Question
dig ip03.mg.infinitecampus.org. NS
Answer
The response has no answer records.
Authority
mg.infinitecampus.org. 251 SOA ibpubdns-inf001.infinitecampus.com. hostmaster.infinitecampus.org. 2023105390 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0