primary.webserversystems.com has no CNAME records.
Question and response
Question
dig primary.webserversystems.com. NS
Answer
The response has no answer records.
Authority
webserversystems.com. 3492 SOA primary.webserversystems.com. support.webserversystems.com. 2023092218 3600 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0