213981.fornex.cloud has no CNAME records.
Question and response
Question
dig 213981.fornex.cloud. NS
Answer
The response has no answer records.
Authority
fornex.cloud. 300 SOA ns1.fornex.com. hostmaster.fornex.com. 2772496326 46800 1800 3600000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0