Subnets

A CLI tool to analyze and calculate IPv4 addresses and masks

Install

This is a single executable, so you can head to the releases page and download the executable (then rename it to subnets) and put it wherever you want to!

Otherwise, if you have rust installed, you can run cargo install --git "https://github.com/margual56/subnets".

Run example

(Here the colors are missing)

$ subnets -h
Usage: subnets [OPTIONS] <IP>

Arguments:
  <IP>  IP address (with or without a mask)

Options:
  -n, --hosts <HOSTS>      Specifies the number of hosts.
  -s, --subnets <SUBNETS>  Specify a config file.
  -c, --csv                Output in csv format.
  -h, --help               Print help information (use `--help` for more detail)
  -V, --version            Print version information

$ subnets "192.168.0.0/26"
IP: 192.168.0.0/26
The mask is 255.255.255.192 and can hold 62 PCs (or 61 PCs and 1 gateway)
With this mask, the subnet IP range is from 192.168.0.0 to 192.168.0.63
IP in binary:   11000000.10101000.00000000.00000000
Mask in binary: 11111111.11111111.11111111.11000000

$ subnets "192.168.0.0" --subnets test.json
╭───────────────────┬──────────────────────┬───────────────────────┬─────────────────┬───────────────────────────────────╮
│ Name              │ Requested # of hosts │ Mask                  │ Max. # of hosts │ Range                             │
├───────────────────┼──────────────────────┼───────────────────────┼─────────────────┼───────────────────────────────────┤
│ Sala B2           │ 241 PCs              │ (/24) 255.255.255.0   │ 254             │ 192.168.128.0   - 192.168.128.255 │
│ Sala B1           │ 131 PCs              │ (/24) 255.255.255.0   │ 254             │ 192.168.129.0   - 192.168.129.255 │
│ Sala A2           │ 120 PCs              │ (/25) 255.255.255.128 │ 126             │ 192.168.130.0   - 192.168.130.127 │
│ Sala A1           │ 96 PCs               │ (/25) 255.255.255.128 │ 126             │ 192.168.130.128 - 192.168.130.255 │
│ Sala C1           │ 61 PCs               │ (/26) 255.255.255.192 │ 62              │ 192.168.131.0   - 192.168.131.63  │
│ Sala C2           │ 25 PCs               │ (/27) 255.255.255.224 │ 30              │ 192.168.131.64  - 192.168.131.95  │
│ Sala D1           │ 15 PCs               │ (/27) 255.255.255.224 │ 30              │ 192.168.131.96  - 192.168.131.127 │
│ Sala D2           │ 10 PCs               │ (/28) 255.255.255.240 │ 14              │ 192.168.131.128 - 192.168.131.143 │
│ Router4 - Router3 │ 2 PCs                │ (/30) 255.255.255.252 │ 2               │ 192.168.131.144 - 192.168.131.147 │
│ Router1 - Router5 │ 2 PCs                │ (/30) 255.255.255.252 │ 2               │ 192.168.131.148 - 192.168.131.151 │
│ Router2 - Router1 │ 2 PCs                │ (/30) 255.255.255.252 │ 2               │ 192.168.131.152 - 192.168.131.155 │
│ Router5 - Router4 │ 2 PCs                │ (/30) 255.255.255.252 │ 2               │ 192.168.131.156 - 192.168.131.159 │
╰───────────────────┴──────────────────────┴───────────────────────┴─────────────────┴───────────────────────────────────╯
	Note: Rember to reserve 1 address for the gateway!

Usage

subnets -h will show the help.

For analyzing a single ip/mask just run subnets "<IP/mask>" (for example, subnets "192.168.0.0/24").