PDCDNS.vzbi.com has no TXT records.
Question and response
Question
dig PDCDNS.vzbi.com. TXT
Answer
The response has no answer records.
Authority
vzbi.com. 600 SOA omzdns9.verizon.com. domainlegalcontact\.verizon.com. 1308540 1200 960 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0