Unicornscan

Summary

Unicornscan is a free network reconnaissance tool that sends asynchronous, stateless probes and records responses. Documented scan modes include TCP SYN scans, UDP probes with protocol-specific payloads, local-network ARP discovery, and stateless TCP traceroute. Alicorn offers a web interface for reviewing scan history, host and port statistics, OS fingerprinting, and network topology. Results can be exported to PostgreSQL through the pgsqldb module; Alicorn uses PostgreSQL for storage and starts a PostgREST API alongside its web server. Optional free DB-IP Lite databases add country, city, and ASN lookups to scan output and the interface. Packages are listed for Debian, Ubuntu, Fedora, RHEL-compatible distributions, and macOS through Homebrew or DMG. Linux capabilities are set automatically so scans can run without root privileges. The Alicorn interface requires Docker and PostgreSQL. Compound scan modes beginning with ARP only work against targets on the local broadcast domain, since ARP requests cannot cross routers. The project points users to its website and GitHub Issues for support.

Who it is for

Unicornscan suits users conducting network reconnaissance who need TCP, UDP, ARP, or traceroute scan modes and results analysis. Users wanting Alicorn should be prepared to use Docker and PostgreSQL.

Compared on port scanner software

Free plan

Yesunicornscan.org

Deployment

cliunicornscan.org

Scan scope

networkunicornscan.org

Service detection

Yesunicornscan.org

OS detection

Yesunicornscan.org

API access

Yesunicornscan.org

Facts

Purpose

Unicornscan is an asynchronous stateless network stimulus delivery and response recording tool for scalable, high-speed network reconnaissance.unicornscan.org · 2 Oct 2026

TCP and UDP scanning

The getting-started guide documents TCP SYN scans and UDP probes with protocol-specific payloads.github.com · 2 Oct 2026

Discovery and tracing

Documented scan modes include local-network ARP discovery and stateless TCP traceroute.github.com · 2 Oct 2026

Web interface

Alicorn is a web interface for viewing and analyzing scan results, including scan history, host and port statistics, OS fingerprinting, and network topology visualization.unicornscan.org · 2 Oct 2026

Database integration

The pgsqldb module can export scan results to PostgreSQL, which Alicorn uses for data storage.unicornscan.org · 2 Oct 2026

API

The Alicorn startup process launches a PostgREST API alongside the web server.unicornscan.org · 2 Oct 2026

GeoIP

Optional free DB-IP Lite databases enable country, city, and ASN lookups in scan output and the web interface.unicornscan.org · 2 Oct 2026

Supported systems

Prebuilt packages are listed for Debian, Ubuntu, Fedora, RHEL-compatible distributions, and macOS via Homebrew or DMG.unicornscan.org · 2 Oct 2026

Requirements

The Alicorn web interface requires Docker and PostgreSQL for data storage.unicornscan.org · 2 Oct 2026

Permissions

The package guide says Linux capabilities are set automatically so scans can run without root privileges.unicornscan.org · 2 Oct 2026

Network scope limit

Compound modes beginning with ARP require targets on the local broadcast domain because ARP requests cannot cross routers.github.com · 2 Oct 2026

Support

The install guide points users to the project website and GitHub Issues for support and bug reports.unicornscan.org · 2 Oct 2026

Creator

The project README says Unicornscan was created by Jack C. Louis.github.com · 2 Oct 2026

Where it ranks on Everything Xiaomi

• Best Port Scanner Software in 2026#5 of 25

Sources

• unicornscan.org/docs/install-package· checked 2 Oct 2026
• github.com/robertelee78/unicornscan/blob/main/docs· checked 2 Oct 2026
• github.com/robertelee78/unicornscan· checked 2 Oct 2026
• github.com/robertelee78/unicornscan/blob/main/LICE· checked 2 Oct 2026