ns2.cyclos.com.mx has no CNAME records.
Question and response
Question
dig ns2.cyclos.com.mx. NS
Answer
The response has no answer records.
Authority
cyclos.com.mx. 8772 SOA ns1.cyclos.com.mx. root.v175597.neubox.net. 2026012501 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0