Use this network utility to parse, normalize, convert, or derive IPv4, IPv6, subnet, reverse-DNS, or MAC addressing information under a stated prefix convention.

IPv6 address

IPv6 address in RFC 4291 notation, optionally with an embedded IPv4 tail.

Canonicalize an IPv6 address into its compressed RFC 5952 form. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Compressed address

Canonical compressed address.

• Syntax and arithmetic validity do not establish reachability, ownership, routing, DNS, privacy, or authorization. IPv4 special-use ranges, IPv6 scopes and compression, prefix boundaries, mapped forms, and host-count conventions require explicit handling.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Validate against current IANA registries and the target platform, test boundary prefixes, and use live network tools only with appropriate authorization.

• IPv6 Address Expander

  Expand an IPv6 address into its full eight-group lowercase form.

• IPv4 to Integer

  Convert a dotted-decimal IPv4 address into its 32-bit integer form.

• IPv6 Reverse DNS Name Builder

  Expand an IPv6 address into its nibble-reversed ip6.arpa name.