Port 60428 — Unassigned Ephemeral Port

What This Port Actually Is

Port 60428 is unassigned. There is no RFC, no protocol, no standard service listening here. It lives in the dynamic port range (49152–65535), a reservation by IANA for ports that aren't permanently assigned to anything.¹

The distinction matters. Ports 1–1023 are well-known: SSH, HTTP, DNS, each with history and purpose. Ports 1024–49151 are registered: applications stake a claim, get it approved, build permanent infrastructure. But 49152–65535? That range is explicitly left open for anything temporary.

Why This Range Exists

When your computer makes an outgoing connection, it needs a source port—something to put in the packet so the response knows where to come back to. Rather than permanently assigning ports for every possible connection, the operating system borrows from the dynamic range. Your browser might use port 60428 for exactly one HTTPS request, then release it back to the pool.²

This is how millions of connections can exist simultaneously without exhausting the port space. It's intentional scarcity made efficient.

If You See This Port in Use

If you notice something listening on 60428, it's almost certainly:

• An ephemeral port in active use — A client application made an outgoing connection and your OS assigned this number
• A custom service — An application configured to listen here temporarily, or for testing
• A closed port — If nothing is using it, scanning tools will report it as closed or filtered

To check what's actually on the port right now:

# macOS / Linux
sudo lsof -i :60428

# Windows (PowerShell)
Get-NetTCPConnection -LocalPort 60428

These commands will tell you the process using the port and which direction the connection flows.

Why Unassigned Ports Matter

The dynamic range solves a real problem: without it, the Internet would face port exhaustion. Every TCP or UDP connection needs a unique local address (IP + port). With billions of devices and trillions of connections, having a giant pool of temporary numbers is the only reason this works at all.

Port 60428 is probably being reused as you read this. Someone's API call needed a home. For a few hundred milliseconds, this was it. Then gone, available again.

It's the invisible infrastructure of the Internet—the ports nobody names, nobody remembers, and without which nothing would work.

Technical Details

Range: Dynamic/Ephemeral (49152–65535) Protocol: TCP and UDP Registered: No Official Use: Temporary outgoing connections, private services, automatic allocation