This little script can calculate basic subnet info using IP and prefix
- Usage Example
$ subnetter 192.168.0.1/24
IPv4 Address: 192.168.0.1 /24 11000000.10101000.00000000.00000001
Subnet Mask: 255.255.255.0 11111111.11111111.11111111.00000000
Network: 192.168.0.0 11000000.10101000.00000000.00000000
Broadcast: 192.168.0.255 11000000.10101000.00000000.11111111
First Address: 192.168.0.1 11000000.10101000.00000000.00000001
Last Address: 192.168.0.254 11000000.10101000.00000000.11111110
Hosts: 254
Class: C