Subnet Calculator

This is a subnet calculator application written in Python. It calculates the details of each subnet in a main network, including the subnet ID, mask, first and last IP addresses, and broadcast address.

Installation

Before running the application, make sure you have Python 3.7 or higher installed. This CLI app is made using typer, which you will need to install:

pip install typer

Running the Application

You can run the application from the command line with the following format:

python subnet_calc.py network_ip_in_CIDR subnet1=count subnet2=count ....

Example:

python .\subnet_calc.py 190.12.40.0/23 A=125 B=90 C=60 D=50 E=28 L1=1 L2=1 L3=1

Output:

IP=190.12.40.0/23
---------
Subnet Name: A
Subnet ID: 190.12.40.0/25
Mask: 255.255.255.128
First IP: 190.12.40.1
Last IP: 190.12.40.126
Broadcast: 190.12.40.127

Subnet Name: B
Subnet ID: 190.12.40.128/25
Mask: 255.255.255.128
First IP: 190.12.40.129
Last IP: 190.12.40.254
Broadcast: 190.12.40.255

Subnet Name: C
Subnet ID: 190.12.41.0/26
Mask: 255.255.255.192
First IP: 190.12.41.1
Last IP: 190.12.41.62
Broadcast: 190.12.41.63

Subnet Name: D
Subnet ID: 190.12.41.64/26
Mask: 255.255.255.192
First IP: 190.12.41.65
Last IP: 190.12.41.126
Broadcast: 190.12.41.127

Subnet Name: E
Subnet ID: 190.12.41.128/27
Mask: 255.255.255.224
First IP: 190.12.41.129
Last IP: 190.12.41.158
Broadcast: 190.12.41.159

Subnet Name: L1
Subnet ID: 190.12.41.160/30
Mask: 255.255.255.252
First IP: 190.12.41.161
Last IP: 190.12.41.162
Broadcast: 190.12.41.163

Subnet Name: L2
Subnet ID: 190.12.41.164/30
Mask: 255.255.255.252
First IP: 190.12.41.165
Last IP: 190.12.41.166
Broadcast: 190.12.41.167

Subnet Name: L3
Subnet ID: 190.12.41.168/30
Mask: 255.255.255.252
First IP: 190.12.41.169
Last IP: 190.12.41.170
Broadcast: 190.12.41.171