If you have ever checked your IP address and seen something like 192.168.1.1, that is an IPv4 address. But increasingly, you might see something completely different — a long string like 2001:0db8:85a3:0000:0000:8a2e:0370:7334. That is IPv6, and it is slowly becoming the standard.
IPv4: The Original Internet Address
IPv4 was designed in the early 1980s and uses a 32-bit address format. This gives us roughly 4.3 billion unique addresses. That sounded like a lot in 1981, but with smartphones, laptops, smart TVs, IoT devices, and everything else now connected to the internet, we ran out of IPv4 addresses years ago.
To work around this shortage, the internet relies on a technology called NAT (Network Address Translation). Your home router has one public IPv4 address, and all your devices share it using private addresses internally. This works, but it adds complexity and can cause issues with peer-to-peer connections, gaming, and VoIP.
IPv6: The Long-Term Solution
IPv6 uses 128-bit addresses, which means the total number of possible addresses is approximately 340 undecillion — that is a 3 followed by 38 zeros. In practical terms, we will never run out.
Beyond just more addresses, IPv6 brings some real improvements:
- No more NAT — every device can have its own public address, simplifying connections
- Built-in security — IPsec (encryption) was designed as a core part of IPv6, not an afterthought
- Faster routing — simplified packet headers mean routers can process traffic more efficiently
- Better for mobile — IPv6 handles device mobility natively, reducing handoff delays when switching networks
Where Are We in the Transition?
As of 2026, IPv6 adoption is around 45% globally, but it varies enormously by country and ISP:
- India, Germany, France — over 60% IPv6 adoption
- United States — approximately 50%
- Many parts of Africa and Asia — still below 10%
Most major websites and services support both IPv4 and IPv6 (called "dual-stack"). Your device and ISP negotiate which version to use automatically.
How Do IPv4 and IPv6 Talk to Each Other?
Since both protocols coexist on the internet, there are several mechanisms that allow communication between them:
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Dual-stack — the most common approach. Your device, your ISP, and the server you are connecting to all support both IPv4 and IPv6 simultaneously. The system automatically picks the best version for each connection. Most modern devices and ISPs work this way.
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NAT64/DNS64 — used when an IPv6-only device needs to reach an IPv4-only server. A translator sits between the two networks and converts IPv6 packets to IPv4 and back. The device only has an IPv6 address, but it can still access IPv4 websites seamlessly. From the server's perspective, it sees an IPv4 address — the translator's address — not the user's original IPv6 one.
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Tunneling (6to4, Teredo) — older methods where IPv6 packets are wrapped inside IPv4 packets to travel through IPv4-only networks. These are becoming less common as native IPv6 support improves.
In practice, this means that even if your device uses IPv6 natively, the website you connect to might only see an IPv4 address — because somewhere along the way, a translator converted your connection. This is why many IP lookup tools, including ours, will often show you an IPv4 address even if your home network runs IPv6.
How This Affects Your Privacy
There is an important privacy difference between the two protocols. With IPv4 and NAT, many users share a single public IP address — your neighbor, your family members, and potentially hundreds of other customers of the same ISP might all appear to have the same IP. This provides a degree of anonymity by default.
With IPv6, the situation is different. Every device can get its own unique public address. This means a website could potentially track your specific device rather than just your household or ISP node. Modern operating systems mitigate this with "privacy extensions" that generate a new, temporary IPv6 address periodically. However, not all devices or operating systems implement this well, and some IoT devices do not support it at all.
If you use a VPN, this becomes even more relevant. Some VPNs only tunnel IPv4 traffic, which means your real IPv6 address — and with it, your real location — can leak outside the VPN tunnel. This is one of the most common privacy mistakes VPN users make without realizing it.
What Our Tool Shows You
Our IP lookup tool currently detects and analyzes your IPv4 address. This is the address that our server sees when you connect — whether it is your ISP's IPv4 address, your VPN's address, or a translated address from a NAT64 gateway.
You can recognize the format immediately:
- IPv4 looks like:
203.0.113.42(four groups of numbers separated by dots) - IPv6 looks like:
2001:db8:3c4d:15::1a2f:1a2b(long hexadecimal string with colons)
If you see an IPv4 address on our tool, it means either your ISP assigns you an IPv4 address directly, or you are going through a dual-stack or NAT64 translation that presents IPv4 to our server. Either way, the geolocation, VPN detection, and datacenter detection we provide are fully accurate for the IPv4 address shown.
Should You Do Anything About It?
For most people, no action is needed. The transition from IPv4 to IPv6 is happening automatically at the ISP and infrastructure level. But it is worth understanding because:
- If you use a VPN, check whether it supports IPv6 — if it does not, your real IPv6 address could leak and reveal your actual location
- If you run a server or website, enabling IPv6 ensures you are accessible to all users, including those on IPv6-only networks
- If you care about privacy, verify that your device's IPv6 privacy extensions are enabled so your address rotates periodically
Want to see what address the internet sees when you connect? Check your IPv4 address now — we will show you your location, timezone, and whether you are connecting through a VPN or datacenter.