host157.190-123-90.sitsanetworks.net has no CNAME records.
Question and response
Question
dig host157.190-123-90.sitsanetworks.net. NS
Answer
The response has no answer records.
Authority
sitsanetworks.net. 8958 SOA ns1.lzsnet.com.ar. postmaster.lzsnet.com.ar. 2013022603 28800 900 2419200 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0