I'm the IT director at a mid-sized university in Central Europe

Good afternoon. I'm the IT director at a mid-sized university in Central Europe. Years ago we were assigned a /22 that is now mostly unused, since most of our services moved to the cloud and NAT handles the rest. Finance keeps asking whether this space could bring in some money instead of just sitting there. Selling feels too final, the board may want it back one day. Has anyone leased out unused IPv4 space? I'm mainly worried about abuse complaints landing on us and about who actually ends up using our addresses.

Leasing out instead of selling is exactly what we did, for the same reason: you keep ownership and can stop when you need the space back. We put our unused IPv4 addresses on the InterLIR Global marketplace a while ago. You set the lease term you want, and they handle the rest. Both of your worries are covered pretty well: every lessee goes through full KYC, and during active leases InterLIR keeps the abuse mailbox and responds to complaints, so they don't land on your desk. Payments have been on time for us. To manage expectations, the rate depends on block size and demand, so don't count on the top of the price range for the whole /22. They're registered with all five RIRs and work under EU law, which made our legal department relax. Has your block ever had reputation issues in the past?