Question for a certificate

I am new to this forum. I do not know, whether the topic place is here.
I want to ask, anyone know anything about this:
URI: http://www.public-trust.com/cgi-bin/CRL/2018/cdp.crl.
What is the address http://www.public-trust.com
and what is this certificate DigiNotar Cyber ​​CA

PS: sorry for my bad Еnglish.
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This link is download a list of revoked (withdrawn) certificates (CRL = Certificate Revocation List) for this Certificate Authority. When setting up an https connection your browser will check the CRL server of the company that issued the certificate. That is to see if the certificate has not been revoked.

What is the address http://www.public-trust.com
That is the home page of Cybertrust Certifcate Authority.
and what is this certificate DigiNotar Cyber ​​CA
Diginotar is a Dutch certificate Authority that got hacked compromised last year. Diginotar went out of business because of this and stopped issuing certificates in March 2012.