MASSCAN is an Internet-scale port scanner. It can scan the entire Internet in under 5 minutes, transmitting 10 million packets per second, from a single machine. It uses its own ad hoc TCP/IP stack.
It uses asynchronous transmission, similar to port scanners like scanrand, unicornscan, and ZMap. It’s more flexible, allowing arbitrary port and address ranges.
Its usage (parameters, output) is similar to nmap, the most famous port scanner. When in doubt, try one of those features — features that support widespread scanning of many machines are supported, while in-depth scanning of single machines aren’t.
This is free and open source software.
Website: github.com/robertdavidgraham/masscan
Support:
Developer: Robert David Graham
License: GNU Affero General Public License version 3

MASSCAN is written in C. Learn C with our recommended free books and free tutorials.
Related Software
| Terminal-Based Port Scanners | |
|---|---|
| Nmap | Network Mapper for network discovery, administration and security auditing |
| RustScan | Modern take on the port scanner |
| MASSCAN | Mass IP port scanner |
| ZMap | Fast single packet network scanner |
| naabu | Fast port scanner written with a focus on reliability and simplicity |
| Netcat | Built-in port-scanning capabilities, with randomizer |
| sx | Network scanner designed to follow the UNIX philosophy |
| unimap | Scan only once by IP address |
| havn | Fast configurable port scanner |
| Nibble | Local network scanning tool |
| XMap | Fast network scanner for large-scale IPv4 and IPv6 research |
| turbo-scanner | Port scanner and service detection tool |
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