FREE WEB TOOL
Check an IPv4 or IPv6 address and see a normalized form plus common special-purpose classifications.
IPv6 text permits omitted leading zeros and :: compression, so the same address can be written more than one way. Validation also returns a consistent canonical form.
Loopback, link-local, documentation, multicast, and other special-purpose ranges have distinct meanings. The tool names common special ranges and avoids labeling every remaining address as public.