What This Port Is
Port 60748 is unassigned and unregistered. It lives in the dynamic or ephemeral port range (49152-65535), which is reserved by the IANA for temporary, private, or custom use.1 This port will never be officially assigned to a named service.
The Dynamic Port Range and What It Means
The ephemeral port range exists for a simple reason: most communication is temporary. When your browser opens a connection, when a client reaches out to a server, a dynamic port is allocated on your machine for just that moment. Once the connection closes, the port is gone.2
Windows changed its default ephemeral range in Vista and Server 2008 from 1025-5000 to 49152-65535, aligning with IANA recommendations.3 This larger range gives operating systems more breathing room for temporary connections.
Port 60748 falls comfortably in this range. Any application or service can listen on it without asking permission, without registration, without approval. This is both the power and the chaos of the ephemeral space.
Known Uses
Port 60748 has been observed as the listening port for a Liberty command listener in IBM z/OS Connect EE servers.4 When a z/OS Connect EE server starts, it opens an ephemeral command port on the loopback address (127.0.0.1) for internal control and monitoring.
This is exactly what the ephemeral range is designed for: internal, temporary, application-specific communication that exists only for as long as the server is running.
If you find this port listening on your system, it's likely a z/OS Connect EE instance managing internal commands. The port can be configured in the server's bootstrap.properties file or disabled entirely if needed.
How to Check What's Listening on This Port
To see if anything is listening on port 60748:
On Linux/macOS:
On Windows:
Or use a more user-friendly tool:
Why Unassigned Ports Matter
The dynamic range represents 16,384 ports (49152 to 65535). None of them are reserved. All of them are available. This is how software scales: every connection gets its own temporary port, and the operating system manages the chaos.
Without this range, every service would fight over a limited set of well-known ports. Instead, ephemeral ports let millions of connections happen simultaneously, each one using a port that will be gone seconds later.
Port 60748 is invisible infrastructure. It appears and disappears. Most people will never know it exists. But if you're running IBM z/OS Connect EE, it's exactly where your server is listening for commands.
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