Port & protocol reference
Know the port.
Understand the service.
Browse common port assignments and practical service associations. Explore what they do, filter by protocol or category, and copy ready-to-use Nmap service detection commands for your authorized labs.
Port references
1–65535Scannable ports
TCP / UDPTransport types
A port is not proof of a service. This is a curated directory of common ports, not all 65,535 assignments. IANA registers services; actual applications can run on any valid port. Always verify with
nmap -sV.Keyboard shortcut: ⌘K / Ctrl+K · Offline-ready