z305.entelchile.net has no CNAME records.
Question and response
Question
dig z305.entelchile.net. NS
Answer
The response has no answer records.
Authority
entelchile.net. 2603 SOA polux.entelchile.net. hostmaster-serv.entelchile.net. 2025120302 7200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0