Port 10372 — Unassigned, Waiting

What Is Port 10372?

Port 10372 has no official service assignment. It sits in the registered ports range (1024–49151), which means it could theoretically be registered with IANA by any organization requesting a port allocation, but currently it isn't. ¹

The Port Ranges Explained

The Internet's port system divides the 65,535 available ports into three categories:

• Well-known ports (0–1023): Reserved for major protocols. Port 80 (HTTP), 443 (HTTPS), 22 (SSH)—these are the foundation.
• Registered ports (1024–49151): Available for registration by anyone. Organizations apply to IANA, and upon approval, they get an official assignment. ²
• Dynamic/ephemeral ports (49152–65535): The free market. Operating systems assign these temporarily to any application that needs them.

Port 10372 falls in the middle tier—the registered range. It's officially available but currently unassigned.

No Known Unofficial Uses

Unlike some unassigned ports that get claimed by security tools, malware, or niche applications, port 10372 appears to have no documented unofficial uses either. It's not a standard port for any widely-deployed software. If something is using it on your network, it's application-specific or local—not a recognized service.

How to Check What's Listening

To see if anything is actually using port 10372 on your machine:

macOS/Linux:

lsof -i :10372
netstat -tulpn | grep 10372
ss -tulpn | grep 10372

Windows:

netstat -ano | findstr :10372
Get-NetTCPConnection -LocalPort 10372

If nothing appears, the port is truly empty—no process is listening.

Why This Matters

The port system's power lies in this structure. Thousands of ports sit unassigned, creating space for innovation. When a new protocol emerges or a company needs infrastructure, these ports are ready. Port 10372 is a room that exists because the architecture anticipated growth. It's not wasted space—it's potential.

The fact that most registered ports are unassigned isn't a bug. It's evidence that the original designers understood something fundamental: leave room for what you don't yet know.