TLS certificate
The certificate is trusted and in date.
domain.whois.co.kr (Whois Corp.)
issued by Sectigo RSA Organization Validation Secure Server CA (Sectigo Limited)
Sectigo RSA Organization Validation Secure Server CA (Sectigo Limited)
issued by USERTrust RSA Certification Authority (The USERTRUST Network)
USERTrust RSA Certification Authority (The USERTRUST Network)
root