TCP/UDP Port Query

Tool Introduction

This tool is a comprehensive TCP/UDP port query online reference manual, designed to help users quickly find the network service names and detailed descriptions corresponding to various port numbers. It compiles information on "well-known ports" (0-1023) defined by the Internet Assigned Numbers Authority (IANA), as well as "registered ports" (1024-49151) and some "unregistered ports" (49152-65535). Whether you are a network administrator troubleshooting, a developer configuring services, or a security expert performing security analysis, you can efficiently obtain the required port service information through this tool.

How to Use

1. Enter Port Number: In the tool's query box, enter the TCP or UDP port number you want to look up (e.g., 80, 443, 3306).
2. Specify Protocol (Optional): If you know the specific protocol (TCP or UDP), you can add "/tcp" or "/udp" after the port number for a more precise query, for example, "2430/tcp". If not specified, the tool will attempt to find all protocol records matching that port number.
3. Execute Query: Click the query button or press Enter, and the tool will immediately display all service information related to that port number and protocol (if specified) in the table below.

Input parameter format and requirements:

• Enter a valid port number, typically an integer between 1 and 65535.
• Protocol information is optional, for example: 80, 443, 2430/tcp, 2430/udp.

Output result format:

Query results will be presented in a clear table format, including the following three columns:

• Port / Protocol: Displays the port number, and if the protocol is explicitly indicated (e.g., /tcp or /udp), it will also be displayed.
• Name: The service name or abbreviation corresponding to the port.
• Description: A detailed description of the service's function.

Frequently Asked Questions

• Q: What types of port information does this tool include?
• A: This tool includes a wide range of port information, including IANA-defined "well-known ports" (0-1023, such as HTTP, FTP, SSH), "registered ports" (1024-49151, such as MySQL, SOCKS), and some commonly used "unregistered ports" (49152-65535).
• Q: Why does the "Port / Protocol" column in the query results sometimes only show the port number, and sometimes include "/tcp" or "/udp"?
• A: If a port is typically associated with a specific protocol (such as TCP or UDP), or if the protocol is explicitly defined during IANA registration, it will be displayed in the format "2430/tcp". If the protocol is not explicitly stated, it usually means that the port number may be used for both TCP and UDP, or its default protocol is general.
• Q: Can I query by service name?
• A: Currently, this tool primarily supports precise queries by port number. You can roughly browse the table content or use your browser's built-in page search function (Ctrl+F or Cmd+F) to find keywords in service names or descriptions.
• Q: Does a port not being found mean that it is not in use or is insecure?
• A: Not necessarily. This tool provides reference information for standard or common ports. The port range is very large, and many ports may be used for specific, private, or non-standard applications not included in this tool. Furthermore, any port can be misused due to misconfiguration or vulnerabilities, so not finding it does not equate to security.

Notes

• This tool provides static port reference information, not a real-time network port scanning tool. It cannot detect the actual open status of ports on your or any server.
• The use of network ports is very flexible, and the same port number may represent different functions in different operating systems, applications, or services. The "Name" and "Description" provided by this tool are its most common or official uses.
• Before performing any network configuration or security operations, please be sure to combine your actual network environment and needs to thoroughly verify the use of ports to avoid unnecessary risks due to misunderstanding.
• Please ensure that you enter a valid numeric port number. Invalid input will not yield query results.