kaos.verisign.net has no CNAME records.
Question and response
Question
dig kaos.verisign.net. NS
Answer
The response has no answer records.
Authority
verisign.net. 2638 SOA av1.nstld.com. mdnshelp.verisign.com. 1772756358 28800 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0