m0.rg.net has no CNAME records.
Question and response
Question
dig m0.rg.net. NS
Answer
The response has no answer records.
Authority
rg.net. 2818 SOA rip.psg.com. hostmaster.psg.com. 1772515762 86400 3600 2592000 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0