ns2.six-group.com has no TXT records.
Question and response
Question
dig ns2.six-group.com. TXT
Answer
The response has no answer records.
Authority
six-group.com. 300 SOA a1-232.akam.net. dnsadmin.six-group.com. 2012224605 3600 360 2592000 300
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0