dns4.balt.net has no CNAME records.
Question and response
Question
dig dns4.balt.net. NS
Answer
The response has no answer records.
Authority
balt.net. 60 SOA dns1.balt.net. hostmaster.balt.net. 2012073738 3600 900 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0