kwong / subnetfinder

Simple script that calculates the largest allocatable RFC 1918 subnet range

subnetfinder 🔍

Simple python script that calculates the largest allocatable RFC 1918 subnet range.

1. (Optional) Create a virtual environment

$ python -m venv venv

2. (Optional) Activate your virtual environment

source ./venv/bin/activate

3. Install the subnetfinder module

pip install subnetfinder

4. Create and update text file containing list of in-use ranges

# update as necessary
tee list.txt <<EOF
10.0.0.0/16
10.1.0.0/16
EOF

5. Perform the search

make search range=<range e.g. 10.0.0.0/8> mask=<e.g. 10> file=<e.g. ./list.txt>