IPv6 was introduced to permanently solve IPv4 exhaustion and uses a completely different structure. This tool diagnoses whether your device actually uses IPv6 and explains the next-generation address format.
IPv6 uses 128-bit addresses — about 3.4 × 10³⁸ unique values. That is enough to assign the world's population in IP addresses to every grain of sand on Earth and still have room left. Address exhaustion is eliminated at the source, enabling true end-to-end connectivity where each device can hold its own public IP without NAT.
IPv6 is written in hexadecimal groups of 16 bits separated by colons into eight groups. (Example: `2001:0db8:0000:0000:0000:ff00:0042:8329`) To shorten long addresses: 1) Leading zeros in each group may be omitted. 2) One consecutive run of all-zero groups may be replaced with double colons (::). The example above compresses to `2001:db8::ff00:42:8329`.
IPv6 is not just more addresses. IPsec for encryption and authentication is built into the protocol stack, improving protection against eavesdropping and tampering. Fixed header size speeds router processing, and SLAAC (Stateless Address Autoconfiguration) lets devices configure network information and unique IPs without a DHCP server.