I found this utility when attempting to find a way to confirm if another DHCP server is leasing addresses on a network. The main DHCP server (running on a Windows box) would not start and I wondered if it was due to another server handing out addresses. This utility worked like a charm. I didn't find any rouge servers out there but I see how this could be useful if you use multiple routers on a network and want to see if multiple ones are trying to assign addresses. The rest of my troubleshooting can be found here which includes some useful info on importing/exporting DHCP scopes.
Usage for this tool can be found here: