Port 2144: Unassigned — Unofficially Claimed by Iron Mountain LiveVault

What This Port Is

Port 2144 sits in the registered port range (1024–49151). IANA maintains this range for services that have applied and been approved for official assignments. Port 2144 has no such assignment. On the official registry, it is blank.

Blank doesn't mean unused.

The Registered Port Range

Ports 1024–49151 are the middle ground of the port system. Below them: the well-known ports (0–1023), reserved for established protocols like HTTP (80), HTTPS (443), and SSH (22). Above them: the ephemeral ports (49152–65535), used temporarily by operating systems when opening outbound connections.

The registered range exists for services that need a stable, predictable port but aren't foundational enough for the well-known tier. To claim a registered port officially, you apply to IANA. Many services skip this step. They just pick a number and ship.¹

Known Unofficial Use: Iron Mountain LiveVault

Port 2144 TCP was used by the Iron Mountain LiveVault Agent, a managed cloud backup service for enterprise servers. LiveVault agents running on customer machines communicated with Iron Mountain's infrastructure over ports 2144 and 2145. Neither port was ever registered with IANA.²³

LiveVault is largely discontinued, but if you see traffic on port 2144, especially on older Windows servers, this is the likely explanation.

How to Check What's Listening

If you want to know what's using port 2144 on your system:

On Linux or macOS:

ss -tlnp | grep 2144
# or
lsof -i :2144

On Windows:

netstat -ano | findstr :2144
# Then look up the PID:
tasklist | findstr <PID>

If nothing is returned, nothing is listening. The port is dormant.

Why Unassigned Ports Matter

The gaps in the registry tell their own story. Software has always been faster than bureaucracy. A team builds a service, picks a port number that doesn't immediately conflict with anything they know about, and ships. Sometimes they register it later. Often they don't.

This is why port scanners and network monitoring tools matter: the official registry is an incomplete map. The real map is your traffic.