Netcalc

This is a simple CLI network calculator made in PHP. Usage is pretty straight forward. For example, let say you want to know how many usable addresses you will get with a 26 bit netmask, simply run the script as below:

php netcalc.php 26

Or you chmod +x netcalc.php and run it as below:

./netcalc.php 26

The above command will give you the following outut:

Netmask
-------
In slash notation: 26
In dotted decimal: 255.255.255.192
In dotted binary: 11111111.11111111.11111111.11000000

Network size
------------
Total number of addresses: 64
Number of usable addresses for hosts: 62

Copyright

Netcalc is written by Jack-Benny Persson and released under GNU GPL version 2.