48.customer.vtx1.net has no TXT records.
Question and response
Question
dig 48.customer.vtx1.net. TXT
Answer
The response has no answer records.
Authority
vtx1.net. 900 SOA nsb.vtx1.net. fieldopadmin.vtx1.net. 494 10800 3600 2419200 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0