admin.intalpel.com has no CNAME records.
Question and response
Question
dig admin.intalpel.com. NS
Answer
The response has no answer records.
Authority
intalpel.com. 171 SOA ns1-auth.etb.net.co. postmaster.etb.net.co. 2018042689 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0