Port 1302: Reserved — A de-assigned port in limbo

What Port 1302 Is

Port 1302 exists in a peculiar state: officially reserved, but de-assigned. According to IANA's registry, both TCP and UDP variants of port 1302 were removed from active assignment on October 30, 2019¹. The port now carries a "Reserved" status with no service name or description attached.

This is different from an unassigned port. Port 1302 once had a purpose—we just don't know what it was. Now it sits in the registry as a number without a service, a placeholder that neither actively carries traffic nor is truly available for new assignments.

The Registered Ports Range

Port 1302 lives in the registered ports range (1024-49151). This is the middle tier of the port system:

• Well-known ports (0-1023): Reserved for essential Internet services, controlled by IANA
• Registered ports (1024-49151): Available for registration by applications and services
• Dynamic/ephemeral ports (49152-65535): Used temporarily by clients for outgoing connections

Registered ports can be officially assigned to specific services through IANA, but assignment is not mandatory. Some ports in this range are heavily used (like 3306 for MySQL), while others remain unused or see only occasional unofficial traffic.

What "De-assigned" Means

When IANA de-assigns a port, the service that once used it is no longer officially associated with that number. This can happen when:

• A protocol becomes obsolete and is no longer maintained
• A company requests removal of a port they no longer use
• IANA consolidates or reorganizes port assignments
• A service migrates to a different port number

The port doesn't disappear—the number still exists—but it loses its official meaning. Think of it as a street address where the building was demolished but the number remains on the city's grid.

Why De-assigned Ports Matter

De-assigned ports create ambiguity. Without an official service, you can't assume what might be listening on port 1302. It could be:

• Nothing—most likely scenario
• A legacy application that still uses the old assignment
• An unofficial service that chose this number arbitrarily
• Malware attempting to blend in with legitimate traffic

This is why checking what's actually listening on your system matters more than what a port "should" be used for.

How to Check What's Listening on Port 1302

On your own machine, you can see if anything is using this port:

On Linux or macOS:

sudo lsof -i :1302

On Windows:

netstat -ano | findstr :1302

If something appears, you'll see the process ID and can investigate which application is using the port. On most systems, port 1302 will be silent—a number in the registry with nothing attached.

The Quiet Ports

The Internet has 65,535 ports. Some—like 80, 443, or 22—are constantly busy. Others, like port 1302, sit in reserved limbo. They're reminders that the port system isn't static. Services come and go. Protocols evolve. Numbers get reassigned, then de-assigned, then forgotten.

Port 1302 exists. It just doesn't do anything anymore.