masscan ☆
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Description:
TCP port scanner, scans entire Internet in under 5 minutes
Type: Formula  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  formulae.brew.sh
Category: Security
Tags: port-scanner network-security reconnaissance cli cybersecurity
Install: brew install masscan
About:
Masscan is an incredibly fast port scanner designed to probe large networks and the entire internet with exceptional speed. It can scan the entire internet in under 5 minutes by using a custom asynchronous stack. The tool is stateless and independent of the operating system's network stack.
Key Features:
  • Scans the entire internet in under 5 minutes
  • Adapts to network conditions to maintain high speeds
  • Outputs to standard formats like JSON or XML
  • Stateless design for high-performance scanning
Use Cases:
  • Performing large-scale network reconnaissance and inventory
  • Identifying exposed services and open ports across subnets
  • Security auditing of perimeter networks
Alternatives:
  • nmap – Nmap offers deeper service inspection and OS detection, while Masscan prioritizes raw speed for massive network sweeps.
  • ZMap – ZMap is a scientific research tool for internet-wide scanning, whereas Masscan is often preferred for its flexibility and speed in practical security assessments.
Version History
Detected Version Rev Change Commit
Sep 16, 2025 3:33am 0 VERSION_BUMP 95921804
Sep 13, 2024 8:22pm 0 VERSION_BUMP c8929e37
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