What Is My IPv6 Address? How Dual-Stack Networking Works

You may have noticed that IP checker tools sometimes show two addresses — one that looks like "203.0.113.45" and another that looks like "2001:0db8:85a3::8a2e:0370:7334". The first is your IPv4 address. The second is your IPv6 address. Many people are confused by this. This guide explains what IPv6 is, why you probably have one, and how to find it.

WHAT IS AN IPV6 ADDRESS?

IPv6 stands for Internet Protocol version 6. It is the newest version of the Internet Protocol, designed to replace IPv4. An IPv6 address is a 128-bit number written as eight groups of four hexadecimal digits, separated by colons.

Example: 2001:0db8:85a3:0000:0000:8a2e:0370:7334

This can be shortened by removing leading zeros and using :: to represent consecutive groups of zeros:

Shortened: 2001:db8:85a3::8a2e:370:7334

IPv6 addresses look more complex than IPv4, but they follow a clear structure.

WHY WAS IPV6 CREATED?

IPv4 only supports about 4.3 billion addresses. With billions of smartphones, laptops, smart devices, servers, and IoT gadgets all needing internet connections, the world ran out of IPv4 addresses.

IPv6 supports 340 undecillion addresses (that is 340 followed by 36 zeros). This is essentially an unlimited supply — every grain of sand on Earth could have trillions of IP addresses and we would still not run out.

IPv6 was standardized in 1998 but adoption has been slow. As of 2026, major ISPs and networks worldwide support IPv6, and most modern devices are assigned both types.

DO YOU HAVE AN IPV6 ADDRESS?

Not everyone has one. It depends on:

• Whether your ISP supports IPv6 (most major ISPs now do)
• Whether your router supports IPv6
• Whether your device's network adapter has IPv6 enabled

To check right now, visit iptrackertools.com/my-ipv6-address. If your network supports IPv6, your address will appear immediately. If the tool shows "not detected," your connection is IPv4-only.

HOW TO FIND YOUR IPV6 ADDRESS

Using an Online Tool:

The easiest method — visit iptrackertools.com/what-is-my-ip to see both your IPv4 and IPv6 addresses at once.

On Windows:

1. Open Command Prompt (Win + R, type cmd)
2. Type ipconfig
3. Look for "IPv6 Address" under your active adapter
4. It will begin with characters like 2001: or fe80: (fe80 is a link-local address, not your public IPv6)

On Mac:

1. Open Terminal
2. Type: ifconfig | grep inet6
3. Your IPv6 addresses will be listed

On iPhone:

1. Settings >; Wi-Fi
2. Tap (i) next to your network
3. Scroll down to see both IPv4 and IPv6 addresses listed

On Android:

1. Settings >; About Phone >; Status
2. Look for IPv6 Address

WHAT IS DUAL-STACK NETWORKING?

Dual-stack means a device has both an IPv4 and an IPv6 address simultaneously. This is the most common configuration for modern devices and networks during the transition period from IPv4 to IPv6.

How it works:

• When your device connects to a server that supports IPv6, it uses IPv6 automatically
• When it connects to a server that only supports IPv4, it falls back to IPv4
• This happens invisibly in the background — you do not need to do anything

Most major websites including Google, Facebook, YouTube, and Netflix support IPv6. Many smaller or older sites still use only IPv4.

IPV6 PRIVACY: SOMETHING YOU SHOULD KNOW

Unlike IPv4 addresses (which are often shared across many users via NAT), an IPv6 address can be unique to your individual device. This could theoretically allow more precise tracking across networks.

To address this concern, most modern operating systems use "IPv6 Privacy Extensions" which rotate your IPv6 address periodically, preventing long-term tracking. On Windows, Mac, iOS, and Android, this is usually enabled by default.

DOES A VPN AFFECT YOUR IPV6?

Yes — and this is important. Some VPNs only route IPv4 traffic through their tunnel, leaving your IPv6 traffic exposed. This is called an IPv6 leak. Your real IPv6 address can be seen by websites even when your IPv4 is hidden.

To check for IPv6 leaks, use iptrackertools.com/dns-leak-test or iptrackertools.com/webrtc-leak-test. A good VPN should mask both your IPv4 and IPv6 addresses.

IPV4 VS IPV6 QUICK COMPARISON

CONCLUSION

IPv6 is the future of internet addressing, and chances are you already have an IPv6 address without knowing it. Dual-stack networking means your device handles both types seamlessly. Check your IPv6 address at iptrackertools.com/my-ipv6-address right now, and use the leak tests to make sure your VPN is protecting both your IPv4 and IPv6.