ans4.les.net has no CNAME records.
Question and response
Question
dig ans4.les.net. NS
Answer
The response has no answer records.
Authority
les.net. 300 SOA ns1.les.net. arin.les.net. 1390 60 60 7257600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0