Who is my IPv6 ISP?

Your IPv6 ISP

Detecting…

More about your connection

How ISPs provide IPv6

The displayed provider is the internet service provider that holds your IPv6 address. On most connections it is the same company as your IPv4 ISP. If it isn’t, your IPv6 traffic takes a different path to the internet.

How ISPs assign IPv6 addresses

Instead of one shared address, an IPv6-capable ISP gives each customer a prefix: a block of addresses for the whole home network. Typical sizes are:

  • /64: one network segment with about 18 quintillion addresses
  • /56: 256 separate /64 networks, common for home broadband
  • /48: 65,536 networks, often given to businesses

Your router announces the prefix on your network, and each device creates its own address from it automatically.

IPv6 support among ISPs

Most large ISPs and mobile carriers now offer IPv6, and some mobile networks are IPv6-only internally. Support is still uneven among smaller providers and business plans. If yours doesn’t offer it, IPv4 keeps working, but you may run into the side effects of shared IPv4 addresses.

When your IPv6 ISP looks wrong

  • A VPN or hosting company: your VPN carries IPv6 too. That’s expected.
  • A tunnel broker such as Hurricane Electric: your router or computer uses an IPv6 tunnel.
  • Your home ISP while a VPN is connected: your VPN is leaking IPv6 traffic. See the IPv6 proxy and leak check.

Frequently asked questions

Why does my IPv6 ISP differ from my IPv4 ISP?

Your IPv6 traffic may come through a tunnel broker, a VPN that handles only one protocol, or a separate network operated by your ISP’s parent company. With a single provider and no VPN, both normally show the same organization.

Does my ISP support IPv6?

If this page shows a provider name, your ISP gives you working IPv6. If it shows Not detected, either your ISP doesn’t offer it or it’s switched off in your router.

What is an IPv6 prefix?

It’s the block of addresses your ISP assigns to your connection, often a /56 or /64. Every device in your home picks its own address from that block.