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All five regional internet registries have exhausted their free IPv4 pools — the only way to get IPv4 space now is buying or leasing it on a secondary market that moved over $2.5 billion in 2026 alone, at $18-52 per address to buy or $0.30-0.50 per address monthly to lease. That scarcity drives up cost for anyone who has to own or lease IP blocks outright, like datacenter and hosting providers. Residential proxy networks are structured differently — they borrow already-allocated consumer IPs through consent-based participation rather than buying address space — which is part of why residential access holds a kind of value datacenter infrastructure increasingly can't match at the same cost.
The free pool is actually gone
This isn't a future prediction — it's the current state of the internet. All five regional internet registries (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC) have exhausted their freely assignable IPv4 pools. Roughly 3.9 million unallocated addresses remain worldwide, mostly held in the APNIC and AFRINIC regions, against a total allocated pool of about 3.7 billion addresses already assigned. For practical purposes, there's no meaningful path to getting new IPv4 space directly from a registry anymore — the only route is the secondary market, buying or leasing space someone else already holds.
What that scarcity actually costs
The secondary market moved an estimated $2.5 billion in transactions in 2026, growing roughly 12% year over year as exhaustion continues pushing demand toward existing allocations. Purchase prices run in the range of $18-52 per address depending on block size and which registry region it's registered under, with smaller blocks generally commanding a higher per-address price than large ones. Leasing runs steadier, at roughly $0.30-0.50 per address per month across most regions, with tighter-supply regions like APNIC often running above that range.
That's a real, ongoing cost for anyone who needs to own or lease dedicated IPv4 space to operate infrastructure — datacenter hosting providers among them.
Why this doesn't hit residential proxies the same way
Datacenter proxy infrastructure typically depends on IP space the hosting provider owns or leases outright, which means it's directly exposed to the market above — rising acquisition costs eventually work their way into what a datacenter proxy costs to run.
Residential proxy networks are built differently at a structural level: the IPs come from real consumer devices whose owners have opted in, typically through an app's SDK, to share bandwidth when their device is idle. The proxy network doesn't own or lease that IP address — it's borrowing temporary use of an address the person's own ISP already assigned to them as part of ordinary residential internet service. That model doesn't touch the secondary IPv4 market at all, which insulates residential proxy economics from the specific cost pressure datacenter infrastructure faces.
Why residential access is still getting more valuable anyway
Sidestepping the acquisition cost doesn't mean residential IPs are getting cheaper to access — if anything, the opposite pressure applies from a different direction. As more of the internet's growth happens on already-allocated IPv4 space rather than new blocks, and as anti-bot detection increasingly treats ASN-level network origin as a primary signal, a residential-network IP carries a kind of trust that's structurally difficult for datacenter infrastructure to replicate at any price, since that trust comes from the address genuinely belonging to ordinary consumer internet service, not from anything a hosting provider can purchase. That's a scarcity of legitimacy and trust, not of raw address count — and it's a harder scarcity to solve than simply buying more IP space.
What this means practically
This isn't a reason to panic-buy proxy volume, and IPv4 exhaustion has been a known, gradually-priced-in market condition for years rather than a sudden shock. But it does explain a real trend worth understanding: as datacenter IP acquisition costs continue reflecting a scarce, actively-traded secondary market, the price and detection gap between datacenter and residential proxies isn't just about server infrastructure quality — it's tied to two genuinely different economic models for accessing IP addresses in the first place, one of which faces a cost pressure the other structurally doesn't.
FAQ
Has IPv4 actually run out? The freely assignable pools at all five regional internet registries are exhausted. About 3.9 million unallocated addresses remain globally out of roughly 3.7 billion allocated — new IPv4 space now comes only from the secondary market, not directly from a registry.
How much does an IPv4 address cost in 2026? Roughly $18-52 to purchase outright, or $0.30-0.50 per month to lease, varying by block size and registry region. Smaller blocks generally cost more per address than larger ones.
Why are residential proxies less affected by IPv4 scarcity than datacenter proxies? Datacenter proxy infrastructure typically requires owning or leasing IP space directly, exposing it to secondary-market pricing. Residential proxy networks borrow temporary use of consumer IPs that ISPs have already assigned to real households, which doesn't involve buying or leasing address space at all.
Will residential proxies get more expensive because of IPv4 exhaustion? Not directly from acquisition costs, since residential networks don't buy IPv4 space. The value of residential access is rising for a different reason — the trust a genuine residential IP carries with detection systems is difficult for purchased datacenter space to replicate at any price.
IPv4 market pricing, allocation, and exhaustion figures reference 2026 industry reports from IPXO, IPv4Center.com, xTom, and IPBnB.