pwrdns1.edgevm.com has no CNAME records.
Question and response
Question
dig pwrdns1.edgevm.com. NS
Answer
The response has no answer records.
Authority
edgevm.com. 521 SOA ns75.domaincontrol.com. dns.jomax.net. 2016050300 28800 7200 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0