At-a-Glance: Key IPv4 & IPv6 Facts
- Total IPv4 address space: 4.29 billion (that's the theoretical max)
- Usable IPv4 addresses: ~3.7 billion (roughly)
- Global IPv4 free pool: Pretty much gone
- IPv6 address space: ~3.4×1038 addresses
This page is a fixed reference you can cite. It covers the IPv4 shortage and how much IPv6 we're actually using, pulling data from regional internet registries and public IPv6 tracking sources.
What "IPv4 Exhaustion" Means
IPv4 uses 32-bit addressing, so there's only so many unique addresses you can create globally. Back in February 2011, IANA handed out the last batch of IPv4 blocks to the five Regional Internet Registries. Since then, they've all run out of fresh IPv4 addresses to give out. These days, if you need IPv4 addresses, you're basically buying them from someone else or getting them recycled-not getting new ones from the registry.
Country Breakdown: IPv4 Allocation & IPv6 Adoption
The "allocated IPv4" number shows what countries got historically, not what's still available. "IPv4 availability" tells you whether there's actually any left to hand out. "IPv6 adoption" is the percentage of people or traffic using IPv6-though that varies depending on who's measuring it.
Key Highlights (2026)
- Highest IPv6 adoption: India (~70%), Sweden (~65%), Netherlands (~62%)
- Largest IPv4 allocations: United States, China, Japan
- Global IPv4 status: Every region is out of new addresses
Table note: Countries are grouped by how much IPv4 they got early on and where they stand with IPv6. The numbers are approximate and just for comparison.
| Country | Allocated IPv4 | IPv4 Availability | IPv6 Adoption |
|---|---|---|---|
| High IPv4 Allocation (Early Internet Adoption) | |||
| United States | 1.5B+ | Near zero | ~52% |
| China | 330M+ | Near zero | ~35% |
| Japan | 190M+ | Near zero | ~45% |
| Germany | 110M+ | Near zero | ~55% |
| United Kingdom | 95M+ | Near zero | ~50% |
| Moderate Allocation / Transitioning Regions | |||
| Brazil | 90M+ | Very low | ~40% |
| France | 85M+ | Near zero | ~48% |
| Canada | 75M+ | Very low | ~42% |
| South Korea | 70M+ | Near zero | ~60% |
| India | 45M+ | Very low | ~70% |
| Australia | 45M+ | Very low | ~38% |
| Italy | 39M+ | Near zero | ~45% |
| Spain | 36M+ | Near zero | ~50% |
| Russia | 35M+ | Near zero | ~30% |
| Mexico | 33M+ | Very low | ~32% |
| Lower Allocation / IPv6-Forward & Emerging Regions | |||
| Netherlands | 42M+ | Near zero | ~62% |
| Sweden | 30M+ | Near zero | ~65% |
| Indonesia | 26M+ | Very low | ~55% |
| Thailand | 25M+ | Very low | ~50% |
| Vietnam | 24M+ | Very low | ~52% |
| South Africa | 22M+ | Very low | ~35% |
| Argentina | 21M+ | Very low | ~40% |
| Nigeria | 20M+ | Very low | ~25% |
Download the complete dataset (CSV)
For print or citation, reference this table as: MyIPNow IPv4 & IPv6 Exhaustion Statistics by Country (2026).
How to Use These Statistics
- For writers: mention the year (2026) and link back here or to the CSV file.
- For researchers: use the CSV as your starting point and note the year in how you did your work.
- For network teams: think of IPv4 allocation as the old way things were distributed; IPv6 adoption is what matters from now on.