dnssub.com has no TXT records.
Question and response
Question
dig dnssub.com. TXT
Answer
The response has no answer records.
Authority
dnssub.com. 60 SOA ns0.dnssub.com. hostmaster.dnssub.com. 2024061902 1800 1800 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0