IPv4 vs IPv6: Why Does My IP Address Look So Long?
Your IP address used to look like this: 104.22.50.1
Now it looks like this: 2a04:4e41:4100:0000:0000:0000:0000:b060
Your internet isn't broken. You just got upgraded to IPv6 — and most people have no idea what that means for them.
Why IPv4 Ran Out
IPv4 (Internet Protocol version 4) was designed in 1981. It uses 32 bits to represent addresses, which allows for roughly 4.3 billion unique addresses — a number that seemed impossibly large at the time.
By 2011, the global pool of available IPv4 addresses was exhausted. The internet now has more connected devices than IPv4 can address. Your laptop, phone, smart TV, router, thermostat, and security camera each need an IP address. 4.3 billion wasn't enough.
IPv6 uses 128 bits. The total address space: 340 undecillion (3.4 × 10³⁸). That's enough to assign a unique address to every atom on Earth's surface and have addresses left over.
What an IPv6 Address Actually Is
IPv6 addresses are written in hexadecimal (base 16), using the digits 0–9 and letters a–f, separated by colons:
2001:0db8:85a3:0000:0000:8a2e:0370:7334
Consecutive groups of zeros can be collapsed with ::, which is why you often see shorter versions like 2a04:4e41:4100::b060.
It looks intimidating. You'll rarely need to type it manually.
What Changes For You (Very Little)
The protocol change is largely invisible. Your operating system and router handle IPv4 and IPv6 simultaneously — this is called "dual-stack." You don't choose between them; your device picks the right one automatically for each connection.
What's different under the hood:
- No more NAT workarounds. IPv4 ran out of addresses, so ISPs used Network Address Translation (NAT) to let many devices share one public IP. IPv6 gives every device its own globally unique address — NAT becomes unnecessary.
- Slightly more efficient routing. IPv6 packets have a simpler header format, which modern routers process faster. The latency improvement is measurable but typically small.
- Privacy extensions. Most operating systems rotate your IPv6 address periodically to prevent cross-site tracking. This is why your IPv6 address looks different than it did last week.
How to Check Which Protocol You're Using
What Is My IP shows you both your IPv4 and IPv6 addresses if your network supports both. It also shows which protocol your current connection is using as the primary.
If you only see an IPv4 address, your ISP hasn't fully deployed IPv6 yet — this is still common in some regions. If you see both, you're on dual-stack.
Should You Do Anything?
Almost certainly not. IPv6 is enabled by default on every modern device and operating system. Your router firmware likely supports it already.
The only scenario where you'd actively manage IPv6 settings: if you're running a home server, self-hosting services, or working in network administration. For everyday use, the transition is completely transparent.
Check your current addresses with What Is My IP. If you see a long hexadecimal string, that's your IPv6 address — and it means your network is ready for the next several decades of internet growth.
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