ns2.cdnsun.net has no TXT records.
Question and response
Question
dig ns2.cdnsun.net. TXT
Answer
The response has no answer records.
Authority
cdnsun.net. 180 SOA cdnsun.net. hostmaster.worldcdn.com. 1772823024 1200 180 1209600 180
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0