Sign inMonitor a domain
2001:20::/28

2001:20::/28 is the ORCHIDv2 block.

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

Short answer

IANA lists 2001:20::/28 as “ORCHIDv2” (RFC 7343). It is not an ordinary public address.

Block2001:20::/28
First – last2001:20:: – 2001:2f:ffff:ffff:ffff:ffff:ffff:ffff
Sizea /28 (2^100 addresses)
Name in the registryORCHIDv2
Defined inRFC 7343
Allocated2014-07
Valid as source / destinationTrue / True
ForwardableTrue
Globally reachableTrue

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

Sources

  1. IANA IPv6 Special-Purpose Address Registry (CC0) · checked 26 Oct 2026
  2. RFC 7343