Pricing depends heavily on whether you lease or buy and on block size, and the two are not really comparable line items. Leasing is quoted per address per month and right now the going range sits somewhere in the mid thirty to low seventy cent band depending on size, region and registry. Smaller blocks tend to cost more per address, which surprises people. If you want current numbers rather than a 2019 post, marketplaces publish live inventory, and I have been pulling IPv4 Addresses , through IPv4.online, where the per size pricing is listed openly. Tip: give finance both models side by side, leasing as opex and purchase as a one time capex with no renewal risk.