[ ] What can be sold
[ ]Legacy or registered IPv4 blocks your company holds but no longer routes
[ ]Part of a block you can free up by renumbering
[ ]Blocks you'd rather lease than sell
Line 02 · IPv4 blocks
Sell the IPv4 block you're not using.
Companies that got online early often still hold IPv4 address blocks. If yours sits idle, it can be sold or leased through IPv4 marketplaces and brokers. We find out what you hold, confirm you're the registrant, and route it properly.
[ ] SELL NOW[~] CONDITIONAL[X] NEVER FOR SALE
YOU KEEP RUNNING THE BUSINESS[~] Conditions
[~]Your company is the registrant on the registry record (ARIN in North America)
[~]The transfer follows the registry's rules, and the buyer must show need
[~]Payment is held in escrow until the registry updates
[X] Not on the table
[X]Addresses assigned to you by your internet provider
[X]Space you don't hold as registrant
Market reference
Published market data put IPv4 at around $20 per address in the first half of 2026 (IPv4Center H1 2026 report). That's a market reference, not a price or a guarantee for your block.
How it works
01Sort
Find the block: your registry record, old network paperwork, or whoever ran your network early on.
02Shop
Confirm legacy or registered status, then compare IPv4 marketplaces and brokers for sale or lease.
03Sign
The registry transfer, with funds in escrow, on terms you've reviewed.
Questions
- How much is an IPv4 address worth?
- Published market data put IPv4 at around $20 per address in the first half of 2026 (IPv4Center H1 2026 report). Block size, history and registry status all move the price, so treat it as a reference, not a guarantee.
- How do I find out whether my company holds IPv4 addresses?
- Search your company name in the registry's WHOIS (ARIN for North America), check old network paperwork, or ask whoever managed your network in the early years. We can check with you on the inventory call.
- Can we lease a block instead of selling it?
- Yes. Leasing through a marketplace is an option if you might want the block back later.
- What does the transfer involve?
- The registry approves the transfer, the buyer shows a need for the addresses, and payment is held in escrow until the record updates.
Also on the desk
FORM HF-0 · INVENTORY REQUEST
Ready when you are.
A 20-minute call with the Howfold Desk. We'll reply by email with a time.