eddns1.bt.com has no TXT records.
Question and response
Question
dig eddns1.bt.com. TXT
Answer
The response has no answer records.
Authority
bt.com. 600 SOA EDDNS0.BT.COM. zzdnsr.bt.com. 2006031134 28800 7200 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0