heracles.comcel.com.co has no CNAME records.
Question and response
Question
dig heracles.comcel.com.co. NS
Answer
The response has no answer records.
Authority
comcel.com.co. 3256 SOA w2kbogccdnsep.comcel.com.co. nocdatos.comcel.com.co. 2017280868 3600 300 1296000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0