Host Fully Qualified Domain Name FQDN Resolution
This entry from Security Metrics indicates that they are able to resolve the host using Fully Qualified Domain Name information. This is typically done by doing a reverse lookup on the associated IP address.
This is not a security risk.
In many cases, reverse PTR records and other FQDN names are required for proper security, especially with email servers and properly implemented SSL sites. This is not a vulnerability or a risk.