ext.ti.com has no TXT records.
Question and response
Question
dig ext.ti.com. TXT
Answer
The response has no answer records.
Authority
ext.ti.com. 300 SOA oqdibfd.itg.ti.com. hostmaster.ti.com. 2013107773 300 300 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0