controlpanel.gslb.serverdata.net has no CNAME records.
Question and response
Question
dig controlpanel.gslb.serverdata.net. NS
Answer
The response has no answer records.
Authority
gslb.serverdata.net. 3506 SOA gtm-vx1.serverdata.net. hostmaster.serverdata.net. 2026021710 28800 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0