CiberkitSubnet calculator
FreeNetwork, broadcast, hosts, mask and wildcard. With step-by-step guide, map, diagnosis and configuration.
Examples: 192.168.1.130/26 · 10.0.0.5 255.255.255.0 · 172.16.0.0/12
10.20.30.0/24
Privada (RFC 1918)/24Class A (historical)
Address map
10.20.0.0/16 holds 256 /24 networks. Yours is number 31.
10.20.0.010.20.255.255
Inside 10.20.30.0/24
Network 10.20.30.0254 hosts 10.20.30.1 – 10.20.30.254Broadcast 10.20.30.255
10.20.30.0 is the network address: it is not assigned to devices
In binary
Network bits in blue; host bits in orange.
| IP | 10.20.30.0 | 00001010.00010100.00011110.00000000 |
| Mask | 255.255.255.0 | 11111111.11111111.11111111.00000000 |
| Network | 10.20.30.0 | 00001010.00010100.00011110.00000000 |
| Broadcast | 10.20.30.255 | 00001010.00010100.00011110.11111111 |
Tools
4 /26 subnets of 64 addresses (62 usable hosts each).
| # | Subnet | First host | Last host | Broadcast |
|---|---|---|---|---|
| 1 | 10.20.30.0/26 | 10.20.30.1 | 10.20.30.62 | 10.20.30.63 |
| 2 | 10.20.30.64/26 | 10.20.30.65 | 10.20.30.126 | 10.20.30.127 |
| 3 | 10.20.30.128/26 | 10.20.30.129 | 10.20.30.190 | 10.20.30.191 |
| 4 | 10.20.30.192/26 | 10.20.30.193 | 10.20.30.254 | 10.20.30.255 |