Port 60672 — Unassigned, Temporary by Design

What This Port Range Means

Port 60672 falls within the dynamic port range—ports 49152 through 65535. The Internet Assigned Numbers Authority (IANA) set aside this entire range specifically for temporary, private, or ephemeral use. No service can register a claim to any port in this range. They belong to no one permanently. ¹

Operating systems allocate ports from this pool when clients need a temporary endpoint for network communication. When your browser connects to a website, the operating system assigns it an ephemeral port. When a peer-to-peer application needs to listen temporarily, it borrows from this range. When the connection ends, the port goes back into the available pool. ²

Port 60672 Specifically

Port 60672 has no official assignment. However, network documentation occasionally references it in connection with Apple's Xsan filesystem access. ³ Xsan is Apple's Storage Area Network (SAN) system, used for managing shared block storage across multiple Mac systems. Xsan clients use TCP ports throughout the dynamic range, with various ports documented including 61460, 61969, 64460, and others—60672 appears to be one of many ports Xsan may use for client-server communication. ⁴

This is unusual. Most applications don't reliably use the same ephemeral port across sessions. If Xsan does use port 60672, it's either:

• An artifact of how a specific Xsan version was documented
• A port the application prefers but doesn't strictly require
• Part of a documented port range for firewall configuration purposes

The truth is messier than official assignments. Port 60672 demonstrates how the dynamic range, designed for true ephemerality, sometimes gets semi-adopted by specific applications.

How to Check What's Listening

To see what's using port 60672 on your system:

On macOS or Linux:

sudo lsof -i :60672

On Windows:

netstat -ano | findstr :60672

If nothing appears, the port isn't currently in use. If something does, the command will show you which process has claimed it—either an application you recognize, an ephemeral connection your system created, or something unexpected.

Why Unassigned Ports Matter

The dynamic port range exists because the Internet understood something fundamental: not every service needs a permanent number. Most communication is temporary. A web browser connects, downloads a page, and disconnects. An email client sends a message and closes the connection. These conversations don't need numbered doors reserved forever.

By keeping 16,384 ports (49152–65535) as a commons for temporary use, the Internet created room for flexibility. Operating systems can spawn thousands of temporary connections without collisions. Applications can use the range however makes sense. No bottleneck, no registration delay, no bureaucracy.

Port 60672 is one of these temporary doors. It's unassigned because it doesn't need to be assigned. Its freedom to be used and released, used and released again, is the entire point.