ns0.bt.net has no TXT records.
Question and response
Question
dig ns0.bt.net. TXT
Answer
The response has no answer records.
Authority
bt.net. 600 SOA ns0.bt.net. hostmaster.bt.net. 2017032699 28800 7200 604800 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0