e164.arpa has no TXT records.
Question and response
Question
dig e164.arpa. TXT
Answer
The response has no answer records.
Authority
e164.arpa. 3600 SOA pri.authdns.ripe.net. dns.ripe.net. 1772717970 3600 600 864000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0