web-cz00-0199.g2server.com has no CNAME records.
Question and response
Question
dig web-cz00-0199.g2server.com. NS
Answer
The response has no answer records.
Authority
g2server.com. 1800 SOA ns1.geetoo.com. hostmaster.geetoo.com. 20190427 1200 600 1209600 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0