Buying IPv4 addresses requires navigating a complex secondary market involving Regional Internet Registries (RIRs), transfer policies, and strict due diligence to avoid blacklisted or “dirty” IP blocks. While the official free pools were depleted years ago, the demand for IPv4 remains critical for legacy systems and network expansion. This guide provides the exact roadmap to purchase IPv4 blocks safely, comparing top brokers, explaining legal transfer requirements, and highlighting the critical “cleaning” steps most buyers forget.
Imagine finding the perfect IPv4 block for your business, paying thousands of dollars, only to discover the addresses are blocked by major email providers like Gmail or Outlook due to previous spamming activity. This is the “dirty secret” of the IPv4 market. Unlike buying a domain, acquiring IP rights involves technical and reputation audits that, if skipped, can render your investment useless. Whether you are looking to buy IPv4 addresses online or simply exploring the market, understanding the transfer process is your first line of defense.
Many users search for providers like GoDaddy to buy IPs, but this is a common misconception. Hosting providers “rent” you IPs as part of a service contract. They retain ownership. If you cancel the service, you lose the IP. True ownership—which allows you to move the IP between providers—requires purchasing on the secondary market and transferring the registration rights via an RIR.
Buy vs. Lease: Which Strategy Fits Your Needs?
Deciding whether to buy or lease IPv4 addresses depends on your timeline, capital availability, and long-term network stability requirements. Buying offers permanence and asset control, while leasing provides flexibility without the high upfront investment.
In 15 years of network consulting, I’ve seen companies waste budget on purchases they didn’t need long-term, and others struggle with the strict annual contracts of leases. Here is a breakdown to help you decide.
Buying IPv4 (Asset Acquisition)
- Pros: You own the rights. It is a capital asset on your balance sheet. You can move it between ISPs (with an ASN) and it never expires (as long as you pay RIR fees).
- Cons: High upfront cost (currently $30-$45 per IP). The transfer process takes 2-3 weeks.
- Best For: Long-term infrastructure (5+ years), email servers requiring stable reputation, and companies planning to hold assets.
Leasing IPv4 (Operational Expense)
- Pros: Low upfront cost (approx $0.40 – $0.60 per IP/month). Fast deployment (often within 24 hours).
- Cons: You do not own the IP. You cannot build long-term reputation (IP reputation stays with the owner). You may lose the IP if the owner decides to sell.
- Best For: Short-term projects, testing, scaling quickly during peak seasons, or when capital is restricted.
| Feature | Buying IPv4 | Leasing IPv4 |
|---|---|---|
| Ownership | Full Rights Transfer | Usage Rights Only |
| Upfront Cost | High ($30-$45/IP) | Low (Monthly Fee) |
| Setup Time | 2-3 Weeks | 24-48 Hours |
| Reputation Control | Full Control | Shared/Dependent |
Expert Insight: “If you are running a mail server or critical public-facing infrastructure, always buy. Leased IPs often have rotating histories that can trigger spam filters. For internal VPNs or testing environments, leasing is the smarter financial move.” — Network Architect, 20 Years Experience.
Top 3 Reputable IPv4 Marketplaces & Brokers
Finding a safe marketplace is the most critical step in buying IPv4 addresses, as the broker dictates the safety of the transfer and the cleanliness of the IP block. We have analyzed the top SERP results and filtered them based on transparency, cleaning standards, and transfer support.
The secondary market is filled with “gray market” sellers. To protect your investment, we recommend sticking to these verified platforms.
1. IPv4 Global (Best for Large Blocks)
IPv4 Global is a heavyweight in the industry, known for handling massive transactions. If you are looking for a /16 or larger, or need a private, confidential sale, this is often the go-to choice. They act as a full-service brokerage, managing the escrow and paperwork.
- Best For: Enterprise-level purchases and private negotiations.
- Key Feature: Access to a massive inventory and historical price data.
- Visit: IPv4 Global Marketplace
2. IPXO (Best for Leasing & Flexibility)
If you decided that buying isn’t right for you after reading the section above, IPXO is the industry leader in automated IP leasing. Their platform is fully automated, allowing you to lease blocks instantly. They also have a strong focus on abuse prevention and RPKI security.
- Best For: Leasing IPv4, start-ups, and short-term needs.
- Key Feature: Instant deployment and strict abuse monitoring.
- Visit: IPXO Platform
3. IPv4 Connect (Best for Transparency & Fixed Pricing)
IPv4 Connect differentiates itself by offering fixed pricing and detailed blacklist reports upfront. They avoid the “auction” model, which can drive up prices and cause delays. Their marketplace lists the price and the reputation status clearly.
- Best For: Buyers who want certainty on price and IP cleanliness.
- Key Feature: “Buy Now” options and comprehensive blacklist reporting included.
- Visit: IPv4 Connect Marketplace
4. Brander Group (Best for “Dirty” IP Cleaning)
Brander Group specializes in uncovering “dormant” legacy blocks and, crucially, cleaning them. They use proprietary software to scrub IPs off 100+ blacklists before listing them for sale. If you are worried about reputation, this is your safest bet.
- Best For: Risk-averse buyers who prioritize clean IP reputation.
- Key Feature: Pre-sale blacklist remediation and geo-location support.
- Visit: Brander Group IPv4 Services
How to Buy IPv4 Addresses: Step-by-Step Process
You cannot complete an IPv4 purchase without specific technical prerequisites in place, specifically an Org ID and an ASN if you plan to multi-home. Starting this process early saves weeks of delay later.
Before money changes hands, you must be “transfer-ready.” The Regional Internet Registry (RIR) will not transfer the IP block to you if you do not meet these criteria.
Requirement A: The Org ID (Organization Identifier)
You need an account with your regional registry (ARIN for North America, RIPE for Europe, etc.). This is free to set up but requires validating your legal business entity. This Org ID is the “bucket” into which your new IPs will be poured.
Requirement B: The ASN (Autonomous System Number)
If you plan to use these IPs with more than one Internet Service Provider (ISP) for redundancy, you need an ASN. This is what allows you to control the routing of your IPs via BGP (Border Gateway Protocol). If you only use one ISP, they can route the block for you, but you lose the portability advantage of owning the IP.
Requirement C: The RSA (Registration Services Agreement)
You must sign a contract with the RIR (like the ARIN RSA) agreeing to their policies. This is a one-time step that legally binds your organization to the proper use of the number resources.
Golden Nugget: “You can request a /24 (256 IPs) directly from ARIN or RIPE for free (minus membership fees) if you join their waiting list. However, the wait time is currently 3-5 years. The secondary market is for those who need IPs now.”
Step 2: The “Title Search” – Verifying IP Cleanliness
Verifying the reputation of an IPv4 block is the single most ignored step by buyers, often leading to catastrophic deliverability issues later. You must conduct a forensic background check before signing any purchase agreement.
Studies show that 50-60% of IPv4 addresses on the secondary market have some form of blacklist history. If you buy a block previously used for spam, your emails will go straight to junk folders, and you may be blocked from accessing certain websites.
How to Audit an IPv4 Block:
- Check Blacklists: Use tools like Spamhaus, Barracuda, or the broker’s internal report. Ensure the specific /24 subnet is clean.
- Check BGP History: Ensure the block isn’t currently being announced by another AS number (a sign of a hijack or stale records).
- Check Whois: Verify the seller actually matches the organization listed in the RIR database.
Most reputable brokers (like Brander Group or IPv4 Connect) will provide this report for free. Never buy “blind.”
Step 3: Negotiating the Deal & Securing the Transfer
The negotiation phase for IPv4 addresses involves agreeing on a price per IP, signing a formal purchase agreement, and securing funds in escrow to protect both parties. This is where the expertise of a broker becomes invaluable, as they standardize the paperwork that would otherwise require specialized legal review.
Current market pricing fluctuates based on block size and region. As of 2026, you can expect to pay between $30 and $45 per IPv4 address for a standard /24 block (256 addresses). Larger blocks often command a slightly lower price per IP due to economies of scale.
The Escrow Requirement
Never wire funds directly to a seller. A reputable broker or an independent escrow service (like Escrow.com) should hold the funds. The money is only released to the seller once the Regional Internet Registry (RIR) confirms the transfer is complete. This protects you from paying for assets that never arrive.
The Purchase Agreement
You will sign a contract detailing the specific block (e.g., 203.0.113.0/24), the total price, and the warranties. A key clause to look for is the “Clean IP Warranty”—a guarantee from the seller that the IPs are not currently blacklisted. If a broker like Brander Group has already cleaned the block, ensure this documentation is attached to the contract.
Step 4: The Official Transfer Process (2-3 Weeks)
The actual transfer of IPv4 addresses is a bureaucratic process managed by Regional Internet Registries (RIRs) like ARIN, RIPE NCC, or APNIC, typically taking 2 to 3 weeks to finalize. You cannot simply “move” an IP; you must update the official registry records.
Once the contract is signed and funds are in escrow, the technical transfer begins. Here is the timeline you can expect:
Days 1-3: Submitting the Transfer Ticket
The seller initiates a transfer request with the RIR. The buyer (you) receives a notification to log in to the RIR portal (e.g., ARIN Online) and “accept” the transfer request. This links the IP block to your Org ID.
Days 4-10: Registry Review & Due Diligence
The RIR reviews the request. They verify that the seller owns the block and that you (the buyer) are eligible to receive it. In regions like ARIN, you must demonstrate “need” (though this requirement has been relaxed in recent years for transfers). Brokers like IPv4 Global often handle this paperwork for you to prevent rejection.
Days 11-14: Final Approval & Routing Updates
Once approved, the RIR updates the Whois database to show your organization as the new owner. At this point, the escrow is released to the seller. You can now create “Route Objects” in the database, allowing you to announce the IP block to the internet via BGP.
Pro Tip: “Don’t wait for the transfer to finish to start your technical setup. While the RIR is processing the paperwork, configure your routers and firewalls. As soon as the Whois updates, you want to be ready to announce the block immediately to minimize downtime.”
Step 5: Post-Purchase Maintenance & Security
Owning IPv4 addresses is a permanent responsibility requiring annual fees to the RIR and continuous reputation monitoring to prevent blacklisting. The work isn’t done when the money changes hands; maintaining the “health” of your new asset is critical.
1. Pay Annual RIR Fees
RIRs charge an annual maintenance fee based on the size of your block. For example, ARIN charges different tiers for a /24 vs. a /16. Failure to pay can result in the revocation of your address rights.
2. Implement RPKI (Resource Public Key Infrastructure)
Security is paramount. Set up RPKI to cryptographically sign your IP block. This prevents “BGP Hijacking”—where another network accidentally or maliciously routes your traffic. Platforms like IPXO often assist with RPKI setup for leased blocks, but as an owner, you must manage this yourself or via your ISP.
3. Monitor Reputation Continuously
Even if you bought a clean block, your usage matters. If a server inside your network gets hacked and sends spam, your new IPs will be blacklisted. Use monitoring tools to alert you if your IP range appears on lists like Spamhaus or SORBS.
Common Myths & Legal Questions Answered
The market for IPv4 addresses is rife with misconceptions, often stemming from confusion between public and private addressing or the legality of reselling resources. Here are the facts.
Is Buying IPv4 Addresses Legal?
Yes. Buying and selling IPv4 addresses is legal and sanctioned by RIRs under specific transfer policies. You are not buying the address itself (which belongs to the community), but the registration rights to use that address block.
Can I Buy a Single IP Address?
No. The minimum routable block on the public internet is a /24 (256 addresses). You cannot buy just 1 or 5 IPs. If you only need a few, you should lease them or get them from your hosting provider.
Is Changing an IP Address Illegal?
Changing your IP address (via a VPN or proxy) is legal. However, spoofing an IP (faking the source address in a packet header to impersonate another server) is illegal and used for malicious attacks. Buying an IP does not give you the right to spoof traffic.
Is 192.168.1.1 a Real IP?
It is “real” but private. This address is part of a reserved block (RFC 1918) used for internal home and business networks (Wi-Fi routers). You cannot buy or announce 192.168.x.x on the public internet. This guide focuses on Public IPv4 addresses (like 8.8.8.8) which are routable globally.
Conclusion: Your Next Step to Network Expansion
Navigating the IPv4 market may seem daunting, but with the right strategy, it is a manageable and often necessary investment for growing networks. By understanding the difference between buying and leasing, choosing a reputable broker, and following the strict due diligence steps outlined here, you can acquire the resources you need without risking your reputation.
The shortage of IPv4 isn’t going away, and prices continue to rise. Whether you choose the permanence of ownership via a broker like IPv4 Global or the flexibility of leasing through IPXO, the most important step is the first one: getting transfer-ready. Log in to your RIR portal today, verify your Org ID, and start assessing your needs. The IP block your business needs is waiting—it just needs a new, responsible owner.
Frequently Asked Questions (FAQ)
How much do IPv4 addresses cost?
The current market price for IPv4 addresses typically ranges from $30 to $45 per IP address, depending on the block size (e.g., a /24 vs. a /16) and the region. Brokers may charge an additional transaction fee, though some include it in the price.
Is buying IP addresses a good investment?
For businesses with critical infrastructure needs, buying IPv4 is an operational necessity that retains value. Financially, IPv4 addresses have appreciated over time, but they are liquid assets subject to market fluctuations and RIR policy changes.
What is the smallest IP block you can buy?
The minimum block size you can purchase and route globally on the internet is a /24, which contains 256 individual IPv4 addresses. Smaller blocks are not accepted by BGP routing tables.
Who owns the most IPv4 addresses?
Large organizations like the US Department of Defense, major Cloud Providers (AWS, Google, Microsoft), and Telecom giants hold the largest blocks. However, millions of addresses are held by smaller enterprises and institutions.
Is IPv4 being phased out?
Yes, IPv6 is the long-term replacement offering virtually unlimited addresses. However, IPv4 remains dominant for legacy systems. A dual-stack approach (running both IPv4 and IPv6) is the standard for the foreseeable future.
How long does the transfer process take?
From signing the contract to having the IPs routed to your network, the process typically takes 2 to 3 weeks. This includes RIR processing time and coordination between buyer and seller.
Can I return an IPv4 block after buying it?
Generally, no. Sales are final once the transfer is approved by the RIR. However, you can sell the block back to the market or to another broker if you no longer need it.
Belayet Hossain is a Senior Tech Expert and Certified AI Marketing Strategist. Holding an MSc in CSE (Russia) and over a decade of experience since 2011, he combines traditional systems engineering with modern AI insights. Specializing in Vibe Coding and Intelligent Marketing, Belayet provides forward-thinking analysis on software, digital trends, and SEO, helping readers navigate the rapidly evolving digital landscape. Connect with Belayet Hossain on Facebook, Twitter, Linkedin or read my complete biography.