dns1.cvnet.com has no TXT records.
Question and response
Question
dig dns1.cvnet.com. TXT
Answer
The response has no answer records.
Authority
cvnet.com. 900 SOA authns1.cv.net. abuse.cv.net. 2013126897 7200 600 604800 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0