a0.rackcdn.com has no TXT records.
Question and response
Question
dig a2.dscg10.akamai.net. TXT
Answer
The response has no answer records.
Authority
dscg10.akamai.net. 1000 SOA n0dscg10.akamai.net. hostmaster.akamai.com. 1773025468 1000 1000 1000 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0