There are a number of items that get logged into Mac OS X Server with only the unique identifier of the MAC address. Sometimes it helps to find the name based on the MAC address. If you are in an environment using trusted binding you can use Open Directory to do so. To determine the name of a computer based on the MAC address from Open Directory, you can run the following from dscl:
dscl /LDAPv3/127.0.0.1 -readall /Computers RecordName macAddress | grep -A 1 $MAC