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2001:1::2/128

2001:1::2/128 is the Traversal Using Relays around NAT Anycast block.

Last updated 26 Oct 2026 from the IANA IPv6 Special-Purpose Address Registry

Short answer

IANA lists 2001:1::2/128 as “Traversal Using Relays around NAT Anycast” (RFC 8155). It is not an ordinary public address.

Block2001:1::2/128
First – last2001:1::2 – 2001:1::2
Sizea /128 (2^0 addresses)
Name in the registryTraversal Using Relays around NAT Anycast
Defined inRFC 8155
Allocated2017-02
Valid as source / destinationTrue / True
ForwardableTrue
Globally reachableTrue

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Sources

  1. IANA IPv6 Special-Purpose Address Registry (CC0) · checked 26 Oct 2026
  2. RFC 8155