Registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces

Find DCHP assigned IP addresses

C:\> reg query hklm\system\currentControlSet\services\tcpip\parameters\interfaces /s /f dhcpipaddress

This query is off course especially useful if applied on a remote computer:

C:\> reg query \\REMOTE\hklm\system\currentControlSet\services\tcpip\parameters\interfaces /s /f dhcpipaddress