Port Number Lookup - Free Online Tool
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Port Number Lookup
Look Up Well-Known TCP/UDP Ports and Services
The result will appear here
Error
Please enter a port number or service name.
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Understanding Well-Known Ports
Well-Known Range
Ports 0-1023 are reserved for standard services like HTTP (80), HTTPS (443), and SSH (22).
Firewall Rules
Quickly identify what a specific port in a firewall rule or log entry is actually used for.
Two-Way Search
Look up a port number to find its service, or search by service name to find its standard port.
Client-Side Only
All lookups happen locally in your browser against a bundled reference table — no data is ever sent to a server.
Ports Beyond the Well-Known Range
Ports 1024-49151 are the "registered" range, assignable to specific applications (like 3306 for MySQL or 3389 for RDP), while 49152-65535 are "dynamic" or "ephemeral" ports, typically used as temporary source ports for outgoing client connections rather than fixed service ports.
Key Takeaways
- Bidirectional Lookup: Search by port number or by service name — the tool detects which you entered.
- Common Services Covered: Includes the ports most frequently seen in networking, web, and database work.
- Client-Side Only: All lookups happen locally in your browser — no data is ever sent to a server.