IPv4 prefix
192.0.0.9/32
Special-Purpose Address Block: Port Control Protocol (PCP) Anycast
- Public routing
- expected to be globally reachable
- IP Prefix (CIDR)
- 192.0.0.9/32
- Subnet Mask
- 255.255.255.255
This single IPv4 address is reserved as an anycast address for Port Control Protocol (PCP), which lets clients manage mappings and firewall state in compatible devices.
IANA marks this address globally reachable for its standards-defined service role. That does not guarantee that a route or PCP service is available from every network.
A system administrator should treat the address as protocol infrastructure, not as an end-user host.
Firewall tip: allow it only where PCP is expected. Otherwise classify it as special infrastructure traffic.
| Block | Name |
|---|---|
| 0.0.0.0/8 | "This" Network |
| 0.0.0.0/32 | "This Host on This Network" |
| 10.0.0.0/8 | Private Use (RFC 1918) |
| 100.64.0.0/10 | Shared Address Space - CGN (Carrier-Grade Network Address Translation) |
| 127.0.0.0/8 | Loopback |
| 169.254.0.0/16 | Link-Local |
| 172.16.0.0/12 | Private Use (RFC 1918) |
| 192.0.2.0/24 | Documentation (TEST-NET-1) |
| 192.0.0.0/24 | IETF (Internet Engineering Task Force) Protocol Assignments |
| 192.0.0.0/29 | IPv4 Service Continuity Prefix |
| 192.0.0.8/32 | IPv4 Dummy Address |
| 192.0.0.10/32 | Traversal Using Relays around NAT (TURN) Anycast |
| 192.0.0.170/32 | NAT64/DNS64 Discovery |
| 192.0.0.171/32 | NAT64/DNS64 Discovery |
| 192.31.196.0/24 | Autonomous System 112 (AS112) Service |
| 192.52.193.0/24 | Automatic Multicast Tunneling (AMT) |
| 192.88.99.0/24 | Deprecated 6to4 Relay Anycast |
| 192.88.99.2/32 | 6a44 Relay Anycast Address |
| 192.168.0.0/16 | Private Use (RFC 1918) |
| 192.175.48.0/24 | Direct Delegation Autonomous System 112 (AS112) Service |
| 198.18.0.0/15 | Benchmarking |
| 198.51.100.0/24 | Documentation (TEST-NET-2) |
| 203.0.113.0/24 | Documentation (TEST-NET-3) |
| 224.0.0.0/4 | Multicast |
| 240.0.0.0/4 | Reserved |
| 255.255.255.255/32 | Limited Broadcast |