IPv4 Address Broker vs Marketplace: Which Is Right for Your Business?

You've figured out you need more IPv4 addresses. Maybe you're scaling infrastructure, onboarding a new client, or finally filling a gap in your IP space. But when you start looking at options, you quickly run into two very different paths: hire an IPv4 address broker, or go to an IPv4 marketplace yourself.

Both get you there. But they work very differently - and choosing the wrong one can cost you time, money, or both. This guide breaks down exactly how each option works, where each one shines, what hidden costs to watch for, and how to do your due diligence before signing anything.

How IPv4 Brokers Work

An IPv4 broker is a professional intermediary. They sit between buyers and sellers, handle the entire transaction process, and make sure everything complies with RIR (Regional Internet Registry) policies.

Here's the typical flow when you work with an IPv4 address broker:

1. Intake and scoping. You tell the broker what you need - block size, region, budget, timeline. They assess your situation and advise on realistic options.

2. Sourcing. The broker reaches out to their network of sellers. This is where an experienced broker earns their fee: they have access to inventory that's never publicly listed.

3. Due diligence. Before a deal is made, the broker verifies the block - checking ownership records, blacklist status, spam history, routing history, and WHOIS data.

4. Negotiation. The broker negotiates price and terms on your behalf. If anonymity matters (for example, if revealing your identity as a buyer could inflate the price), a broker can keep you unnamed until the transfer stage.

5. RIR coordination. The broker handles all registry documentation, LOA (Letter of Authorization) issuance, and the formal transfer request with the relevant RIR - RIPE NCC, ARIN, APNIC, or LACNIC.

6. Post-transfer support. Good brokers don't disappear after the transfer. They help with RPKI configuration, IRR updates, BGP announcements, and geolocation corrections.

How brokers charge: Most work on a commission basis - typically a percentage of the transaction value. Some charge flat fees for smaller blocks. Watch out for add-on charges on top of the base commission: documentation fees, escrow fees, post-transfer support, and due diligence reports are sometimes billed separately.

A note on RIR recognition: RIPE NCC decommissioned its list of Recognized IP Transfer Brokers in 2023 and has not fully reinstated it. APNIC maintains a list of registered brokers who have signed an agreement to follow its guidelines. Neither list constitutes an official endorsement - but being on the APNIC list is a meaningful credibility signal.

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How IPv4 Marketplaces Work

An IPv4 marketplace is a platform where buyers and sellers meet directly. Think of it like a well-regulated online exchange: listings are public, prices are visible, and you can transact without going through a dedicated intermediary.

The standard process on a marketplace:

1. Registration. Both buyers and sellers create verified accounts on the platform.

2. Browse and select. Buyers see available IPv4 blocks - filtered by size, region, and price. Many marketplaces offer both "buy now" pricing and auction formats.

3. Escrow. The buyer deposits funds into escrow. The platform holds the payment until the transfer is confirmed, protecting both sides.

4. RIR transfer. The seller initiates the transfer through the relevant RIR. The platform facilitates the paperwork, though the level of hands-on support varies significantly by platform.

5. Confirmation and release. Once the block appears in the buyer's RIR account, the escrow funds are released to the seller.

What varies between platforms: Some marketplaces are full-service - they verify blocks before listing, provide transfer support, and actively manage the process. Others are essentially listing boards: they connect you with a seller, but the rest is up to you. Knowing which kind you're using matters a lot.

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Broker vs Marketplace: Side-by-Side Comparison

When to Use an IPv4 Broker

A broker makes sense when the stakes are high, the situation is complex, or speed is less important than getting the deal right.

Go with a broker if:

Many businesses search specifically for a broker to buy IPv4 addresses when they face any of these situations:

• You need a large block. Transactions involving /16 blocks or larger benefit from professional negotiation. The difference between a good and bad deal on a /16 can be hundreds of thousands of dollars.

• You want off-market inventory. Not everything is publicly listed. Brokers can source blocks that never appear on any marketplace - especially useful when supply is tight.

• Your identity matters. If you're a major player in a niche market and revealing yourself as a buyer would push prices up, a broker can keep you anonymous through most of the process.

• The deal is cross-registry or cross-border. Multi-RIR transfers involving ARIN, RIPE, and APNIC simultaneously are genuinely complex. A broker with multi-registry experience handles this without you needing to become an expert in each registry's rules.

• You have no in-house expertise. If nobody on your team has done an RIR transfer before, a broker's knowledge is worth the commission.

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When to Use an IPv4 Marketplace

A marketplace is the right call when you want transparency, speed, and control - and when the deal is relatively straightforward.

Go with a marketplace if:

• You're buying or leasing a standard block. If you need a /24, /23, or /22 in a specific region, a marketplace with real-time inventory is the fastest way to find it and close the deal.

• You want to see the market clearly. Listed prices give you real-time data on what blocks are actually selling for. That transparency is hard to get when working through a private intermediary.

• You're leasing, not buying. Most leasing transactions - especially shorter-term ones - don't need full broker management. A marketplace handles the logistics cleanly.

• You're selling IPv4 addresses. Listing on a marketplace exposes your block to a large pool of buyers and can drive competitive pricing in your favor.

• You've done this before. If your team knows the transfer process and is comfortable with RIR procedures, the self-service model gives you more control and usually lower costs.

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Hidden Fees and Risks

Neither brokers nor marketplaces are risk-free. Here's what to watch for on both sides.

With brokers

• Commission stacking. A base commission sounds reasonable until you realize escrow, documentation, and due diligence reports are billed separately. Always ask for a complete fee schedule upfront.

• Conflict of interest. A broker who represents both buyer and seller in the same deal has competing incentives. Ask explicitly whether they represent the other party.

• Slow timelines. Complex deals can drag on for weeks or months. If you're in a hurry, a broker's process may not match your timeline.

• Vague post-transfer support. "We'll help after the transfer" means different things to different brokers. Get specific commitments in writing - RPKI setup, IRR updates, geolocation corrections.

With marketplaces

• Listing-board risk. Some platforms that call themselves marketplaces are really just directories. They connect you to a seller but offer no escrow, no verification, and no recourse if something goes wrong.

• Unverified blocks. Without proper pre-listing checks, you could end up with addresses that have a spam reputation, poor routing history, or geo-tagging issues.

• Platform fees on top of price. Transaction fees, escrow fees, and payment processing can meaningfully add to your total cost - and on auction platforms, competitive bidding pushes both the sale price and the platform fees higher at the same time.

• RIR transfer delays. Marketplaces vary widely in how much they help with the actual RIR coordination. If you're not familiar with the process, unexpected delays and revision requests can stall your project.

Due Diligence Checklist

Before you commit to any IPv4 purchase or long-term lease - whether through a broker or a marketplace - work through this checklist:

Verify ownership and registry status

• Check WHOIS records to confirm the seller is the registered holder

• Verify RIR registration details match what the seller claims

• Confirm there are no pending disputes, liens, or encumbrances on the block

• Request and review the LOA (Letter of Authorization)

Check the block's history and reputation

• Run the block through major blacklist databases (Spamhaus, SURBL, MXToolbox)

• Check routing history - has this block been routed before? By whom?

• Look for spam or abuse history in RIPE or ARIN databases

• Verify geolocation data is accurate (incorrect geo-tagging causes real operational problems)

Understand the costs in full

• Get a complete fee breakdown - base price, commission, escrow, documentation, any post-transfer support

• Confirm RIR transfer fees (these vary by registry and block size)

• Clarify whether the platform or broker charges separate fees for due diligence reports

• Ask about costs for RPKI/ROA setup if you need help with this

Review the legal and contractual side

• Ensure the purchase or lease agreement includes clear transfer, liability, and indemnification clauses

• Confirm ownership rights and post-transfer responsibilities in writing

• Verify the transaction structure complies with the relevant RIR's transfer policies

Plan for technical integration

• Consider how the new block fits your subnetting and routing setup

• Plan for reverse DNS configuration and firewall rule updates

• Confirm RPKI/ROA will be configured correctly before you announce the block
  
  

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The Bottom Line

IPv4 brokers and marketplaces both serve legitimate needs - they just serve different ones. If you need a large or complex transaction, want access to unlisted inventory, or prefer to have someone manage the process end-to-end, a broker is worth the premium. If you're buying or leasing a standard block, want real-time price transparency, and are comfortable handling the process yourself (or with light platform support), a marketplace is faster and often cheaper.

The most important thing either way: know exactly what you're getting, verify the block thoroughly, and get every fee and commitment in writing before the deal is done.