Did we run out of IPv4 addresses?

The global IPv4 pool for ISPs is exhausted; providers reuse and share addresses using NAT and carrier-grade NAT. IPv6 was designed to avoid that limitation with a vastly larger address space.

Do I need IPv6 at home?

Not always—many sites work on IPv4-only. Dual-stack (IPv4+IPv6) is ideal when available. Our checker shows IPv6 when your network exposes it.

Blog · IPv6

IPv4 exhaustion and why IPv6 exists

IPv4 allows only about 4.3 billion unique addresses—too few for today’s internet. ISPs use NAT and recycled pools. IPv6 provides a much larger space so every device could have a public address without shortage.

Read: IPv4 vs IPv6 · Why IPv6 might not show