Which tool retrieves detailed information about the process that opened a specific port?

The tool that retrieves detailed information about the process that opened a specific port is Currports. Currports is specifically designed to display a list of all currently opened TCP/IP and UDP ports on a system. It also provides information on which application is associated with each port, including process ID, process name, and location, making it particularly effective for networking analysis and troubleshooting. This capability allows users to track down applications that may be using network resources or exhibiting suspicious behavior.

While other tools like Process Explorer can provide information about running processes, and Task Manager allows for some network-related insights, neither of these tools is specifically focused on displaying port details in the same comprehensive way that Currports does. Fiddler, on the other hand, is primarily a web debugging tool that monitors HTTP/HTTPS traffic, which does not directly address the need for port-related information.