200-50-249-183.isp.cotecal.com.ar has no CNAME records.
Question and response
Question
dig 200-50-249-183.isp.cotecal.com.ar. NS
Answer
The response has no answer records.
Authority
isp.cotecal.com.ar. 3186 SOA ns1.cotecal.com.ar. noc.ayuda.la. 1 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0