dns2.sge.net has no CNAME records.
Question and response
Question
dig dns2.sge.net. NS
Answer
The response has no answer records.
Authority
sge.net. 495 SOA dns1.sge.net. servicedesk.sge.net. 2026012900 7200 1800 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0