404. That’s an error.
The requested URL /bookmarks/mark?op=add&bkmk=https%3A%2F%2Fde.adminsub.net%2Fmac-address-finder&title=MAC+Adressenfinder+-+de.adminsub.net was not found on this server. That’s all we know.
/bookmarks/mark?op=add&bkmk=https%3A%2F%2Fde.adminsub.net%2Fmac-address-finder&title=MAC+Adressenfinder+-+de.adminsub.net