Find Port Numbers for TCP, UDP & Network Services Port Number Reference tool for network operations.
Port Number Reference
Port Number Reference tool for network operations.
Enter a Port Number or Service Name
Type a port number or service name into the search field.
Review Matching Results
View the protocol, service, and description for the matched port.
Copy Port Details
Copy the port information to your clipboard.
What Is Port Number Reference?
A Port Number Reference is a resource that maps port numbers to their corresponding services and protocols, such as TCP and UDP, allowing users to look up what port does HTTP use or other common network port numbers. Network engineers and developers use it to identify which ports are used by specific services, like FTP or SSH, and to troubleshoot connectivity issues. One specific problem it solves is the difficulty of remembering well-known port numbers, such as port 80 for HTTP or port 443 for HTTPS, which can be time-consuming and prone to errors.
The tool is particularly useful because it provides an instant port number lookup, with a mobile-friendly interface that runs entirely in the browser, sending no data to any server. This means that users can quickly find the information they need without having to consult a separate list of common network port numbers or wait for a response from a server.
What makes this tool different is its ability to filter results based on user input, allowing users to search for specific port numbers, services, or protocols, such as TCP UDP port numbers. It also includes a comprehensive list of ports, including less common ones like port 9090 for Prometheus or port 9200 for Elasticsearch, making it a valuable resource for anyone working with network operations and needing to reference a well-known port numbers list.
Why Use Port Number Reference?
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Instant port lookups
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100% client-side processing
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Mobile-friendly layout
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No signup required
Common Use Cases
Development
Web dev and debugging.
Networking
Network config.
Education
Learn concepts.
Security
Security analysis.
Technical Guide
The tool works under the hood by utilizing client-side JavaScript and React to filter a predefined list of port numbers, services, and protocols based on user input. This list is stored in an array of objects, where each object represents a specific port number with its corresponding service name, protocol, and description. When the user types something into the search bar, the tool uses the `useMemo` hook from React to filter this list in real-time, checking if the search query matches any part of the port number, service name, protocol, or description. The filtering process is case-insensitive, thanks to the use of the `toLowerCase()` method.
The tool's user interface is built using React components, including the `InputWithHelp` component, which provides a text input field with a hint and helper text. The filtered list of port numbers is then rendered in a table, with each row representing a single port number and its corresponding information. If no matching ports are found, the tool displays a message indicating that no results were found. The tool's mobile-first responsive design ensures that it works well on smaller screens, making it accessible to users on a variety of devices. From a technical perspective, the tool uses ES6+ syntax and React hooks for state management, following modern web development standards and best practices.
In terms of specific technologies used, the tool relies on React's `useState` hook to store the user's search query and the filtered list of port numbers. The `useMemo` hook is used to memoize the filtering process, ensuring that it only runs when the search query changes. The tool also uses JavaScript's built-in string methods, such as `includes()` and `toLowerCase()`, to perform the actual filtering. Additionally, the tool uses CSS classes to style its user interface, with class names like `glass-card` and `text-muted-foreground` indicating a specific visual design. Overall, the tool's use of modern web development technologies and techniques makes it fast, efficient, and easy to maintain.
Tips & Best Practices
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1Filter by typing a port number, service name, or protocol in the search bar
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2Use keywords from descriptions to find related ports
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3Check the 'Port' column for exact matches
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4Look at the 'Protocol' column to distinguish between TCP and UDP
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5Scroll through the table to view all matching results
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6Enter partial port numbers to find close matches
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🌐 Network & WebFrequently Asked Questions
Q Is the port number reference tool free to use?
Q Is it safe to look up ports with this tool?
Q Does the port lookup tool work on mobile devices?
Q Can I use this tool offline?
Q What browsers support this port number tool?
About This Tool
Port Number Reference is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.