dns2.computer42.org has no CNAME records.
Question and response
Question
dig dns2.computer42.org. NS
Answer
The response has no answer records.
Authority
computer42.org. 5522 SOA dns1.computer42.org. hostmaster.computer42.org. 2511171816 10800 3600 2592000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0