If you are in the market to buy an IPv4 address, then you're in luck. There are auctions of ARIN (American Registry Of Internet Numbers) distributed IPv4 addresses online that you can participate in. This is a great opportunity if you want a reputable seller, easier access to IPv4 addresses, or more flexibility when buying these addresses. Verifiable Brokers One of the best reasons to participate in an ARIN auction is that the auctions can easily be done with a verified and reputable broker, rather than trying to work with individuals directly who may not have any IPv4 addresses at all.