c0.nic.red has no CNAME records.
Question and response
Question
dig c0.nic.red. NS
Answer
The response has no answer records.
Authority
nic.red. 300 SOA a0.nic.red. alerts.afilias.info. 1772753736 86400 7200 300000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0