Port 2364: Unassigned — An Empty Room in the Registered Range

What Range This Port Belongs To

Port 2364 falls in the registered port range (1024–49151), sometimes called user ports. IANA manages this space — applications and protocols can apply to claim a number here, and the assignment becomes official.

Port 2364 has never been claimed. IANA lists it as unassigned.¹

That's not unusual. The registered range contains over 48,000 ports, and thousands of them sit empty. The Internet standardized around a few hundred well-known protocols, and the rest of the space remains open territory.

Known Unofficial Uses

Some port databases flag port 2364 as having been associated with malware activity.² This is worth knowing, but worth context too: security databases often copy flags from each other without the original source. If you see port 2364 open on a system, that's a reason to investigate — not a confirmation that something is wrong.

No specific, named malware family is reliably documented as using this port as its primary channel.

Applications that need a port and don't want to conflict with well-known services sometimes land in this range informally. If something on your system is using port 2364, it's almost certainly a local application, a game, or developer tooling — not an IANA-recognized protocol.

How to Check What's Listening

If you see port 2364 active on your system:

On Linux or macOS:

# Show what process is listening on port 2364
ss -tlnp | grep 2364

# Or with lsof
lsof -i :2364

On Windows:

netstat -ano | findstr :2364

Then take the process ID from the output and look it up:

tasklist /FI "PID eq <pid>"

The process name will tell you what's actually there.

Why Unassigned Ports Exist

The port number space was designed with the assumption that protocols would be registered and documented. In practice, most of the registered range went unclaimed — applications grabbed numbers informally, developers hardcoded whatever wasn't obviously taken, and the IANA registry became a map with large stretches of blank territory.

Unassigned ports aren't a problem. They're just space. The problem is when something unexpected occupies that space without explanation.