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2002::/16

2002

Last updated 2 Nov 2026 from the IANA IPv6 Special-Purpose Address Registry

Short answer

2002::/16 is 6to4: IPv6 addresses built from a public IPv4 address.

Block2002::/16
First – last2002:: – 2002:ffff:ffff:ffff:ffff:ffff:ffff:ffff
Sizea /16 (2^112 addresses)
Name in the registry6to4
Defined inRFC 3056
Allocated2001-02
Valid as source / destinationTrue / True
ForwardableTrue
Globally reachableN/A

What it means

RFC 3056 defined 6to4, where 2002:WWXX:YYZZ::/48 corresponds to the IPv4 address WW.XX.YY.ZZ. It has been deprecated for relays (RFC 7526) and is rarely seen now.

The IPv4 address inside it is the real one that was used.

Want the address websites actually see for you? Open the Truth Check.

Sources

  1. IANA IPv6 Special-Purpose Address Registry (CC0) · checked 2 Nov 2026
  2. RFC 3056