IPv6 prefix
2001:10:0:0:0:0:0:0/28
Special-Purpose Address Block: Deprecated Overlay Routable Cryptographic Hash Identifiers (ORCHID)
- Public routing
- deprecated; registry flags are not applicable
- IP Prefix (CIDR)
- 2001:10:0:0:0:0:0:0/28
- Address Count
- 1.2677 x 10^30
This block was reserved for the original Overlay Routable Cryptographic Hash Identifiers (ORCHID) experiment and is now deprecated.
This block should not be treated as ordinary globally reachable host address space.
A system administrator may see it in old documentation, historical logs, synthetic data, or applications that kept deprecated identifier formats.
Firewall tip: treat it as obsolete identifier space and drop it as ordinary Internet traffic unless a legacy lab explicitly uses it.
| Block | Name |
|---|---|
| 0:0:0:0:0:0:0:1/128 | Loopback |
| 0:0:0:0:0:0:0:0/128 | Unspecified Address |
| 0:0:0:0:0:ffff:0:0/96 | IPv4-Mapped Address |
| 64:ff9b:0:0:0:0:0:0/96 | Network Address Translation 64 (NAT64) Well-Known Prefix |
| 64:ff9b:1:0:0:0:0:0/48 | Network Address Translation 64 (NAT64) Local-Use Prefix |
| 100:0:0:0:0:0:0:0/64 | Discard-Only Address Block |
| 100:0:0:1:0:0:0:0/64 | Dummy IPv6 Prefix |
| 2001:0:0:0:0:0:0:0/23 | IETF (Internet Engineering Task Force) Protocol Assignments |
| 2001:0:0:0:0:0:0:0/32 | Teredo |
| 2001:1:0:0:0:0:0:1/128 | Port Control Protocol (PCP) Anycast |
| 2001:1:0:0:0:0:0:2/128 | Traversal Using Relays around NAT (TURN) Anycast |
| 2001:1:0:0:0:0:0:3/128 | DNS-SD Service Registration Protocol Anycast |
| 2001:2:0:0:0:0:0:0/48 | Benchmarking |
| 2001:3:0:0:0:0:0:0/32 | Automatic Multicast Tunneling (AMT) |
| 2001:4:112:0:0:0:0:0/48 | Autonomous System 112 (AS112) Service |
| 2001:20:0:0:0:0:0:0/28 | Overlay Routable Cryptographic Hash Identifiers Version 2 (ORCHIDv2) |
| 2001:30:0:0:0:0:0:0/28 | Drone Remote ID Protocol Entity Tags (DETs) |
| 2001:db8:0:0:0:0:0:0/32 | Documentation (RFC 3849) |
| 2002:0:0:0:0:0:0:0/16 | 6to4 |
| 2620:4f:8000:0:0:0:0:0/48 | Direct Delegation Autonomous System 112 (AS112) Service |
| 3fff:0:0:0:0:0:0:0/20 | Documentation (RFC 9637) |
| 5f00:0:0:0:0:0:0:0/16 | Segment Routing over IPv6 (SRv6) Segment Identifiers |
| fc00:0:0:0:0:0:0:0/7 | Unique Local Address |
| fe80:0:0:0:0:0:0:0/10 | Link-Local Unicast |
| 0:0:0:0:0:0:0:0/8 | Reserved by IETF (Internet Engineering Task Force) |
| 0:0:0:0:0:0:0:0/96 | Deprecated IPv4-Compatible IPv6 Prefix |
| fec0:0:0:0:0:0:0:0/10 | Deprecated Site-Local Unicast |
| ff00:0:0:0:0:0:0:0/8 | Multicast |