a7-65.akam.net has no CNAME records.
Question and response
Question
dig a7-65.akam.net. NS
Answer
The response has no answer records.
Authority
akam.net. 33 SOA internal.akam.net. hostmaster.akamai.com. 1712081400 90000 90000 90000 180
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0