IP Address
Source:
IPv4
[0-255].[0-255].[0-255].[0-255]
Private address:
| Block | Size | Note |
|---|---|---|
10.0.0.0/8 | 24 bits | |
172.16.0.0/12 | 20 bits | Docker default subnet: 172.17.0.0/16 |
192.168.0.0/16 | 16 bits | Many home routers use this by default |
IPv6
ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
According to RFC 5952, the shortened (compressed) form is unique if it follows these rules:
Zone ID
fe08:9012:3451::1234%1
A device with two or more network cards can use a different zone id for each.
CIDR
Classless Inter-Domain Routing: a method to efficiently classify IPs, e.g. 192.168.0.0/16.