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Ubify Core Engineering Team
SOFTWARE ENGINEERS & SYSTEMS ARCHITECTS
About This Tool
The Network Port Lookup directory provides network engineers, sysadmins, and cybersecurity analysts with an instant reference guide for standard TCP and UDP port assignments. Search by port number (such as 22, 53, 80, 443, or 3306), protocol name, or service keyword (like SSH, DNS, HTTP, HTTPS, or MySQL).
The searchable table details standard transport protocols (TCP/UDP), official IANA service names, typical service descriptions, and common security considerations (such as plaintext transmission risks on port 21 FTP or port 23 Telnet). This helps engineers write firewall rules, inspect nmap port scans, and configure cloud security groups. All search queries filter a local in-browser dictionary without sending your search terms or network queries to external servers.
How to Use
- 1
Type a port number (e.g., 443) or service name (e.g., ssh) into the search filter.
- 2
Review matching ports, transport protocols (TCP or UDP), and standard service descriptions.
- 3
Check security notes regarding encryption status and common firewall configuration practices.
- 4
Clear the search filter to browse the full catalog of well-known and registered ports.
Frequently Asked Questions
What are well-known ports?
Well-known ports range from 0 to 1023 and are assigned by IANA to core internet protocols like HTTP (80), HTTPS (443), SSH (22), and DNS (53).
What is the difference between TCP and UDP ports?
TCP (Transmission Control Protocol) is connection-oriented and guarantees reliable packet delivery, whereas UDP (User Datagram Protocol) is connectionless and optimized for low-latency streaming and real-time queries.
Are my searched ports or IP lookups sent to a remote server?
No. The directory filters an in-memory client-side JavaScript database entirely inside your local browser.