What This Port Is
Port 2143 is registered with IANA under the service name lv-jc — Live Vault Job Control. It's in the registered port range (1024–49151), meaning some organization went through the process of claiming it with the Internet Assigned Numbers Authority.
That organization was LiveVault Corporation, a Marlborough, Massachusetts company that provided online server backup and recovery services. The lv-jc service was the job coordination layer — the component that scheduled and managed backup jobs running between the LiveVault agent on a customer's server and LiveVault's storage infrastructure.1
The Registered Port Range
Ports 1024 through 49151 are registered ports. They're not reserved for system services like the well-known ports below 1024 are, but they're not free-for-all either. Companies and developers can register a port with IANA for a specific application, which is supposed to reduce conflicts and let network administrators know what to expect when they see traffic on that number.
Registration doesn't mean a service is still active. It means someone filled out a form at some point and IANA added it to the registry. Port 2143 is proof of that.
LiveVault: A Brief History
LiveVault was an early online backup service — a category that barely existed before broadband made it practical. Iron Mountain, better known for physical document storage, acquired LiveVault in 2005 for $50 million.2 The service changed hands several more times after that, eventually landing with a company called CyberFortress in 2021.3
Through all of it, port 2143 stayed in the IANA registry. Port numbers don't get acquired.
Is Anything Still Running on This Port?
Almost certainly not in any meaningful volume. The LiveVault agent software that used these ports is legacy software from a company that no longer exists under that name. If you see traffic on port 2143 today, it's either:
- A very old LiveVault installation still running somewhere
- An unrelated application that chose this port because it appeared unoccupied
- A port scanner probing for vulnerabilities
How to Check What's Listening
If you want to see whether anything on your system is using port 2143:
Linux/macOS:
Windows:
If nothing comes back, nothing is listening. That's almost certainly what you'll see.
Why This Matters
IANA's port registry has over 49,000 registered entries. Many of them look like port 2143 — registered for a product that outlived its company, or for a feature that was never widely deployed. The registry is a historical record as much as it's a technical one.
This is why network tools can't always tell you definitively what's running on a given port just from the number. A registered assignment is a starting point, not a guarantee. If you need to know what's actually using a port, check the process — not the registry.
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