Open Source Python Network Scanners

NetAlertX is a network visibility and asset intelligence framework for continuous device discovery and monitoring. It is designed for homelabs, IT teams, MSPs, NOCs, and distributed environments that need a centralized view of connected assets. The platform monitors devices, detects changes, tracks unauthorized hardware, and helps maintain a source of truth for network infrastructure. It supports discovery through methods such as arp-scan, Pi-hole imports, DHCP lease imports, UniFi controller imports, and SNMP-enabled router imports. NetAlertX can send notifications through many services, connect with Home Assistant, expose API endpoints, and support custom automation through webhooks and plugins. It also supports multi-site monitoring through Sync Nodes, making it useful for remote sites, VLANs, branch offices, and segmented networks.

Zippy Ip Scanner is a free, open-source cross-platform IP scanning application written in python.

VScan is a small, text-based, platform independent port scanner written in python, which supports multithreading and banner grabbing.

A Simple Port Scanner in Python. You need python installed on your pc before you can use the script!