IPv4 scarcity makes address costs an important part of infrastructure planning. Whether you run a small VPS, operate a hosting platform, or manage an enterprise network, the cost of just one more /24 has become a real line item in your budget. Public IPv4 availability and pricing deserve attention alongside server capacity. This article explains the pressures on IPv4 prices, how transfer and leasing markets work, and concrete strategies to keep projects affordable without blocking growth. If you are planning new services, migrations, or data center expansions, understanding the economics of IPv4 is now as important as CPU, RAM, and storage sizing.
IPv4 Address Costs: What Changed?
From a protocol perspective, the size of the IPv4 address space has not changed. Public IPv4 availability is constrained because most of the registry free pools have already been allocated. Remaining allocation options depend on the registry and its policies. For expansion, organizations often obtain addresses through their provider, purchase a block through an approved transfer, or lease space from an existing holder.
At the same time, our expectations for connectivity have risen. Always-on VPNs, high-availability clusters, microservices, managed databases, private SaaS environments, staging and test networks, IoT backends, and security appliances all consume addresses. These workloads do not necessarily need dedicated public IPv4 addresses: many can use private addressing and shared public endpoints. Applications requiring inbound reachability or stable public identities can still add pressure to the finite public pool.
If you want the broader backstory of how IPv4 ran out globally, see our earlier article on where all the IPv4 went and why exhaustion was so quiet. Here, we will stay focused on IPv4 costs and practical choices for your next capacity plan.
What Puts Pressure on IPv4 Prices
There is no single cause of expensive IPv4. Scarcity, demand, transaction costs, and address reputation can all affect pricing and 3–5 year capacity plans. Here are the main pressures to consider.
1. Exhausted or Restricted Registry Pools
In February 2011, IANA allocated its remaining /8 blocks to the five Regional Internet Registries (RIRs), exhausting that central free pool. Regional allocation options now depend on the registry and its policies. For example, ARIN reports depletion of its free pool on 24 September 2015, with limited reserved-policy and waiting-list options. RIPE NCC offers eligible members a single /24 through a waiting list as addresses are recovered. Check your RIR’s current eligibility, limits and available options before planning an allocation; a pending request is not guaranteed capacity.
Registry free-pool depletion does not mean previously allocated IPv4 addresses have disappeared. Additional space may be available through transfers under applicable RIR policies or leases from existing holders. Availability, offered blocks, demand and contractual conditions affect the options and price; scarcity alone does not establish a current record price or predict future increases.
2. Public IPv4 Requirements in Hosting, SaaS, and Edge Services
On the demand side, several sectors have uses for public IPv4:
- Hosting and VPS providers: Customers may require a dedicated IPv4 per VPS or dedicated server, especially if they run mail servers or legacy apps.
- SaaS platforms: Some customers require dedicated public endpoints or outbound IPs for allowlisting, increasing demand compared with shared endpoints.
- CDNs, proxies, and security appliances: Reverse proxies, WAFs, and DDoS scrubbing nodes can share IPs, while regional endpoints and routing designs can require additional ranges. Anycast can also reuse the same prefix across multiple locations.
- Enterprise and industrial networks: VPN gateways and partner-facing endpoints may need public addresses; internal and OT systems do not inherently need public addressing.
Organizations in these sectors compete for the same finite IPv4 pool when they need public addresses.
3. Pricing Benchmarks and Transaction Costs
Another consideration is how IPv4 changes hands. Transfers involve both commercial agreements and registry procedures, and may involve brokers, legal review, and escrow. These services can help manage transaction risk but also add costs that belong in the acquisition budget.
Published transaction ranges can provide benchmarks, but asking prices are not completed-sale prices. Expected lease income can influence a holder’s asking price; it does not establish a guaranteed floor. Sale prices also depend on demand, block size, contract terms, and the space available for sale.
4. Address Reputation and Due Diligence
Not all IP addresses are equal. Addresses with a poor history of spam, abuse, or blocklisting can be significantly less useful, especially for email or API traffic to risk-sensitive partners. These factors can affect what a buyer is willing to pay, but accurate RPKI/IRR records do not establish a clean abuse history or guarantee reputation.
For example, an operator running mail infrastructure or B2B APIs might pay more for a block without known blocklist entries to avoid remediation work. Cleanup time varies by listing and underlying abuse. For guidance, see our article on recovering email sender reputation and safely warming up IPs.
5. Holders’ Decisions to Sell, Lease, or Retain Space
Holders with surplus IPv4 space can choose to sell it, lease it, or retain it for future use. Expectations of future value may influence those choices, but appreciation is not assured. If holders delay sales, less space may be available to buyers at a given time, potentially affecting prices. This is a possible market mechanism, not evidence that withholding or speculation is currently driving IPv4 prices upward.
How the IPv4 Market Works Today
If you have not been through an IPv4 deal yet, it can feel mysterious. In practice, there are two main paths: purchasing address space (a transfer) or leasing it (address rental). Each has cost, risk, and operational implications that go far beyond the sticker price.
Buying IPv4 Space
Purchasing a block means you become the registered holder at your RIR. The process typically includes:
- Justification: Demonstrating need or usage plans to the RIR, depending on policy.
- Due diligence: Verifying that the seller is the legitimate holder, checking for disputes or hijack history.
- Transfer approval: Coordinating with the RIR for paperwork and database updates.
- Operational setup: Updating route objects, RPKI ROAs, IRR records, and configuring routing on your infrastructure.
The main benefit is control: after an approved transfer, you are not dependent on a lessor’s renewal policies. Use across data centers and transit providers still depends on applicable registry policies, upstream acceptance, routing arrangements, and valid route authorization. Registration alone does not guarantee portability or global reachability. The trade-off is upfront capital plus applicable recurring RIR membership or maintenance fees and operational costs.
Leasing IPv4 Space
Leasing provides contractual rights to use a block for a defined period in exchange for a recurring fee; it does not make you the registered holder. Agree who will advertise the space and how the holder will coordinate the required RPKI ROAs, IRR records, and any authorization requested by upstreams. The lease alone does not ensure route acceptance. Leasing can be attractive if:
- You have a short- to medium-term need, such as a migration or product launch.
- Budget approvals for OPEX are easier than for a one-off capital purchase.
- You want to test a new geography or network design before committing.
However, there are important caveats:
- You are exposed to renewal price changes and contract terms.
- You need strong guarantees that the lessor is the legitimate holder.
- You must have a clean exit strategy in case the lease ends or policies change.
Renumbering services when a lease ends can create migration work. That hidden operational cost may exceed the savings of a short-term discount.
The Operational Overhead that Hides Behind Every /24
Whether you buy or lease, getting IPv4 is only the start. Every new block needs engineering attention:
- Routing: BGP announcements, upstream coordination, prefix-length considerations, and aggregation strategy.
- Security: Firewall rules, DDoS protection, abuse handling, and log correlation.
- Reputation: Checking for existing blocklist entries, configuring rDNS, and setting up proper abuse contacts.
- Routing authorization and documentation: RPKI ROAs, IRR route objects, and records for audits or partners, coordinated with the registered holder where necessary.
These tasks cost engineer time. When you factor them in, the “real” cost of another /24 is not just the dollar figure in a transfer contract; it is everything needed to safely bring those addresses into production and keep them clean.
The Real Cost of “Just One More IPv4 Block”
From the outside, it is easy to see IPv4 as a simple commodity. From inside the data center, the story is very different. Let us look at hypothetical examples of how the true cost can play out for different types of organizations.
A Small SaaS Platform Adding a New Region
Imagine a SaaS team planning to deploy its application into a second region for latency and redundancy. Its initial public-address budget lists a /24 for app servers, a /25 for VPN and internal services, and several IPs for outbound mail and monitoring. This is a proposal to challenge, not a sizing recommendation: internal services can generally use private addressing, while public VPN gateways need only the addresses their design requires. If the team retains a public /25, it must confirm that a provider will route it within a larger advertised aggregate. RFC 7454 documented /24 as a common IPv4 prefix-length acceptance boundary, while explicitly noting that policies can change. Do not assume a /25 can be independently announced with dependable reachability; confirm current upstream filtering and aggregate routing arrangements. Even a /24 needs routing confirmation. Beyond those prerequisites:
- Buying that space locks a significant amount of capital into addresses.
- Leasing means taking on migration risk when the contract ends.
- Every public endpoint increases their attack surface and monitoring scope.
If they use private IPv4 or IPv6 for internal communication and share public IPv4 through suitable gateways or reverse proxies, they may reduce their public IPv4 requirement. The savings depend on which services need dedicated addresses and on client compatibility.
A Growing Hosting Provider with Legacy Expectations
Traditional hosting customers often expect 1:1 mapping between servers and IPv4 addresses, especially for older control panels, custom mail setups, or licensing systems that key off IP. If customer requirements and allocations per customer stay unchanged, doubling the customer count would double IPv4 demand as well.
A smaller provider could be squeezed if customers continue to expect dedicated IPv4 addresses while upstream allocation costs rise. Providers then face a difficult choice: raise prices, limit IPv4 allocations, or redesign service plans around shared IPs and IPv6.
This is also where education helps. Explaining how SNI lets compatible HTTPS clients access multiple domains sharing one IP can help customers assess shared hosting. IPv6 suitability also depends on their users’ connectivity.
An Enterprise Network with Mergers and Acquisitions
Enterprises that grow through acquisitions inherit many overlapping RFC1918 ranges and fragmented public space. When they try to integrate networks, they often discover that simply merging everything behind NAT creates operational chaos. Non-overlapping addressing can simplify integration, but buying public IPv4 to readdress multiple business units can be expensive and is not the only option.
Here, a thoughtful mix of technologies is needed: careful use of private addressing, dual-stack designs, and well-planned renumbering. A structured IPv6 plan using globally unique allocations can give each site ample non-overlapping space for internal traffic, while reserving public IPv4 for services that require it. Globally unique addressing does not mean internal services should be publicly accessible; routing policy and firewalls must still enforce the intended boundaries.
Practical Strategies to Live with Expensive IPv4
You cannot control global market prices, but you can assess how efficiently you use the addresses you already have. The available savings depend on current allocations and service requirements. A smaller address count lowers the invoice only if billable allocations or lease charges fall. Compare gateway, redundancy, traffic, migration, monitoring and ongoing operating costs over the same planning period; included package charges must not be counted twice. Here are practical approaches to evaluate for your infrastructure.
1. Take IP Address Management (IPAM) Seriously
Before buying more space, check whether your address inventory accurately reflects current use. A clean IPAM pass should include:
- Inventory all subnets and VLANs across data centers and sites.
- Identify long-abandoned test, lab, or pilot environments still holding live addresses.
- Consolidate fragmented /30s and /29s into more efficient allocations.
- Audit DHCP scopes and static assignments for stale reservations.
Low traffic does not prove an address is unused. Verify ownership, DNS, listeners, NAT, allowlists, mail and recovery dependencies; migrate remaining uses and test a rollback path before releasing it. Retiring genuinely unused public lab ranges and using /31 addressing on supported IPv4 point-to-point links can reclaim IPv4 addresses. RFC 3021 treats both addresses on such a link as host addresses. For IPv6 point-to-point inter-router links, /127 addressing is a separate consideration, not a direct IPv4 saving. Follow RFC 6164’s support and reserved-address constraints, including disabling Subnet-Router anycast for a /127 prefix; this is not a general recommendation for host LANs.
NAT is not a silver bullet, but used thoughtfully it can extend the life of your IPv4 pool significantly. Consider:
- Shared egress IPs: Outbound-only services like software updates, telemetry, or external API calls can often share a small pool of addresses.
- Reverse proxies and load balancers: Many HTTP/S services can sit behind a small set of frontend IPs, even if they fan out to dozens of backend servers.
- Private routing for internal microservices: Service-to-service traffic rarely needs its own public address; internal routing or IPv6 is usually better.
The key is to separate “needs a dedicated public IPv4 address” from “is reachable from the internet”. Those are not the same requirement. Reverse proxies, VPN gateways, and tunneling protocols can expose suitable services without assigning a unique IPv4 to each one. Check protocol compatibility, gateway capacity and availability, NAT port limits, and logging needs before consolidating. Shared egress also means shared reputation and potentially shared rate limits at external services. If workload attribution is required, a shared IP alone is insufficient: retain the relevant protocol, internal identity, translated address/port and time, with appropriate access and retention controls.
3. Make IPv6 a First-Class Citizen, Not a Side Project
IPv6 is not just a checkbox for auditors; it is your best long-term answer to IPv4 scarcity. When you move internal communication, API calls, and user-facing traffic to IPv6 where possible, you may be able to reclaim public IPv4 allocations once their IPv4 dependencies are removed. Merely adding IPv6 alongside IPv4 does not free addresses.
For more on planning a dual-stack rollout, see our guide on accelerating IPv6 adoption. Start with compatible frontends and controlled internal admin access, monitor reachability and security on both protocols, and expand usage deliberately.
4. Modernize Email and Outbound Communication Strategies
Email can create requirements for stable sending IPs and reputation management, but it does not inherently require one public IPv4 per server. Shared outbound relays may consolidate addresses where policy and reputation requirements allow. IPv6 support varies by recipient network. Verify PTR and the sending hostname, SPF authorization of the actual sending IPv6 address, DKIM signatures and DMARC alignment. Moving to IPv6 alone does not require new DKIM keys or a new DMARC policy. These checks and reputation monitoring do not themselves ensure IPv6 acceptance or delivery.
If your roadmap includes serious email sending or if you plan to host your own mail servers on a VPS or dedicated machine, our detailed playbook on email deliverability over IPv6 is a good companion to this article. Evaluate IPv6 delivery against recipient support and sender reputation, retaining IPv4 delivery where needed rather than dividing traffic solely by reputation sensitivity.
5. Design New Projects for IPv6-First from Day One
It is much easier to avoid IPv4 dependence than to unwind it later. For new applications or greenfield deployments, consider:
- Running backends and databases on IPv6-only networks where their protocols and dependencies support it, using compatible dual-stack proxies for clients that still need IPv4.
- Publishing AAAA records only after IPv6 routing, listeners, TLS, access policies and application dependencies pass tests; prepare the dual-stack frontend for the first release.
- Documenting “IPv6-first” in your architecture diagrams and runbooks.
- Ensuring logs, metrics, and security tools fully understand IPv6 from day one.
An IPv6-only VPS can use NAT64/DNS64 for outbound access to compatible IPv4 web and API endpoints; serving IPv4-only visitors requires a separate dual-stack frontend or other inbound solution. Test the actual applications and resolver path: literal IPv4 addresses bypass ordinary DNS64 synthesis, and DNSSEC validation arrangements need explicit compatibility checks. For an overview, see our guide on hosting a website on an IPv6-only VPS using NAT64/DNS64.
Why IPv6 Matters in a High-Price IPv4 World
For years, IPv6 was framed as “the future of the internet”. That framing subtly encouraged teams to treat it as optional. In a world where IPv4 is cheap and plentiful, you can get away with that. When IPv4 is expensive, postponing IPv6 can increase dependence on a scarce resource, though the business case still depends on compatibility and migration costs.
Here are potential benefits of moving toward IPv6:
- Cost insulation: You may still need IPv4, but workloads that no longer require public IPv4 allocations can reduce your exposure to future price spikes.
- Network simplicity: Globally unique IPv6 allocations with a structured subnet plan reduce the need for overlapping RFC1918 gymnastics in complex topologies.
- Better growth headroom: IPv6-compatible microservices and environments can grow without each requiring additional public IPv4 space, provided their remaining IPv4 dependencies are served through suitable shared endpoints.
- Reachability: Dual-stack endpoints offer a native IPv6 path to clients with working IPv6 connectivity while retaining IPv4 compatibility. Performance depends on the actual network paths and should not be assumed to improve.
The trick is not to rip out IPv4 overnight. Instead, treat IPv4 as the constrained, premium resource that it is, and treat IPv6 as the default where possible. Over a few years, putting that approach into practice can make a visible difference in both costs and operational flexibility.
Principles for IP Address Planning
IPv4 planning needs to account for acquisition costs, applicable RIR policies, and workloads that still require public IPv4 addresses. Three principles can guide those decisions:
- IPv4 is scarce and valuable: Allocate it carefully across shared hosting, VPS, dedicated servers, and colocation, avoiding wasteful 1:1 mappings where they are not needed.
- IPv6 is the default where possible: Design new platforms and network segments to be IPv6-ready from the start, so future growth does not automatically mean “buy more IPv4”.
- Clean routing and reputation: Pay close attention to routing hygiene, rDNS, and abuse handling to help protect the reputation and usability of your IPv4 space.
For a new project, look beyond the number of IPs requested: define what you are building, how traffic flows, how you plan to send email, which regions matter, and what medium-term growth looks like. Then assess whether a different design could reduce IPv4 needs while meeting performance and flexibility requirements.
If you are at the stage where IPv4 costs are starting to influence project timelines or business models, bring that constraint into the architecture conversation early. It is much easier to design a dual-stack, IP-efficient platform from the start than to retrofit it after pricing has already bitten into your margins.
Planning Your Next Move in a High-Price IPv4 World
IPv4 scarcity creates cost pressure, but it does not establish that prices are at record highs or will keep rising. You cannot control the global market, but you can control how exposed your infrastructure and business model are to that market. Treat IPv4 as the expensive, limited resource it has become. Invest in better IP address management, smarter NAT and proxy patterns, and an IPv6-first mindset for all new work.
For a related discussion of price pressures, see our article on IPv4 pricing and response options. Its record-high framing is not evidence of current market levels; this guide focuses on budgeting and address efficiency rather than verifying price records. Your next step is practical: review current allocations, confirm routing prerequisites before acquiring space, identify waste, and set a realistic roadmap for IPv6 across your web, application, and email stacks.
For a new deployment or an existing shared hosting, VPS, dedicated server, or colocation setup, discuss IPv4 requirements and IPv6 availability with your provider. When evaluating dchost.com, ask which addressing options fit your workload and budget, and account for possible price changes. The sooner you align your architecture with today’s IP economics, the more room you will have to scale calmly, instead of negotiating every new /24 under pressure.
