If you’re not using them, why not lease them out to businesses that need additional addresses? In addition to increasing your profits on unused assets, leased IP address generate recurring income every month. You can buy and lease IPv4 address space from anywhere in the world: Germany, USA, Africa. To do this, you need to create a sub-allocation pool of one or more contiguous /8s (256 to 65,536 individual /24 blocks). The person will pay for a single allocation from that pool, which is how they receive their desired number of IP addresses. When IPv4 lease time expire after five years (or earlier if either party decides), you’ll be able to use those blocks again for your purposes. This way, everyone wins! You can lease unneeded IP addresses and create a stream of recurring revenue; potential lessees get access to address space without waiting for a future round of IPv4 allocations; Internet users have uninterrupted access when transitioning from one leased block to another.