Local IP Finder (ipscanner)

A professional, cross-platform, fast concurrent local network scanner written in Python.

This tool automatically detects your local IP address and scans your entire /24 subnet using concurrency (ThreadPoolExecutor) for optimal performance, finding all active devices connected to your network.

Features

• Auto-detection: Automatically finds your machine's base network so no hardcoding is necessary.
• Concurrent Scanning: Uses high-performance threading to ping multiple IPs up to 254 times concurrently.
• Cross-Platform: Configures ping commands based on the OS (Windows, macOS, Linux).
• Graceful Interruptions: Supports fast exit with clean cancellation of threads during Ctrl+C.
• Customizable: Allows defining explicit subnets, thread pool sizing, and timeouts.
• ARP Resolution: Lists the ARP table at the end of the scan to map IPs to MAC addresses.

Output Example

2026-03-11 11:20:05 [INFO] Auto-detected local IP: 10.121.186.162 (Base network: 10.121.186)
2026-03-11 11:20:05 [INFO] Scanning network 10.121.186.0/24 with 50 concurrent threads...
2026-03-11 11:20:06 [INFO] Active IP found: 10.121.186.1
2026-03-11 11:20:06 [INFO] Active IP found: 10.121.186.39
2026-03-11 11:20:07 [INFO] Scan complete. Found 2 active devices.

Retrieving ARP table mapping...
...

Installation

You can install the tool directly from PyPI using pip:

pip install ipscanner

Usage

You can run the script right away to auto-scan your local subnet:

ipscanner

Advanced Usage

You can also use command-line arguments to customize behavior:

usage: ipscanner [-h] [-n NETWORK] [-t THREADS] [--timeout TIMEOUT]

A professional, fast concurrent local network scanner.

options:
  -h, --help            show this help message and exit
  -n NETWORK, --network NETWORK
                        Base network to scan (e.g., '192.168.1'). Auto-detected if not provided.
  -t THREADS, --threads THREADS
                        Number of concurrent threads for pinging (default: 50).
  --timeout TIMEOUT     Ping timeout in milliseconds (default: 1000).

Example setting custom threads and network segment:

ipscanner -n 192.168.0 -t 100 --timeout 500