IPv4 vs IPv6: What's the Difference?
IPv4 and IPv6 are two versions of the Internet Protocol, the system that gives every device an address. IPv4 addresses look like 192.168.1.1. IPv6 addresses look like 2001:0db8:85a3::8a2e:0370:7334.
The short version: the world ran out of IPv4 addresses, so IPv6 was created with vastly more room. Here is what that means for you.
Why IPv6 exists
IPv4 allows about 4.3 billion addresses. That sounded like plenty in the 1980s, but phones, smart TVs, and connected gadgets ate through them. IPv6 allows 340 undecillion addresses, effectively unlimited.
Most networks today run both at once (dual-stack), so the transition is invisible to you.
Which one am I using?
Load our homepage. If the address shown contains colons, you are on IPv6. If it is four groups of numbers separated by dots, you are on IPv4. Many connections show both.
Does it matter for speed or privacy?
For everyday use, no meaningful speed difference. Privacy-wise, IPv6 addresses can be more stable per device, which is one reason privacy tools and VPNs remain popular.
Frequently asked questions
Will IPv4 go away?
Not anytime soon. The two will coexist for many years because so much existing equipment and software depends on IPv4.
Is IPv6 better for gaming or streaming?
Slightly, in theory, because it removes the need for NAT translation. In practice most people notice no difference.
How do I know if my ISP supports IPv6?
Visit our homepage. If you see an IPv6 address, your connection supports it. If you only see IPv4, your ISP or router may not have it enabled.