PDNS90.ULTRADNS.com has no TXT records.
Question and response
Question
dig PDNS90.ULTRADNS.com. TXT
Answer
The response has no answer records.
Authority
ultradns.com. 60 SOA pdns196.ultradns.net. domains.vercara.com. 2017038242 10800 3600 86400 60
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0