Port 2815: LBC Measurement — A Name Without a Story

What This Port Is

Port 2815 sits in the registered ports range: 1024 through 49151. These ports are different from the well-known ports below 1024 — you don't need root privileges to bind to them, and IANA maintains a registry so that services can claim a number and prevent collisions.

IANA's registry lists port 2815 as "lbc-measure" — LBC Measurement — on both TCP and UDP.¹ That's the entirety of the official record. No RFC. No specification. No contact information. No description of what LBC stands for or what it measures.

The Ghost Registration Problem

The registered ports range holds over 48,000 port numbers. Many were claimed by organizations that had good intentions and never followed through. A port number gets reserved, the product gets cancelled or pivoted, the team moves on — and the IANA entry remains. The port is taken. No one is using it.

Port 2815 appears to be one of these. Searches turn up no software, no protocol documentation, no forum posts from developers implementing or debugging "LBC Measurement." The registration exists, the name exists, and beyond that: nothing.

This isn't a security risk. It's just empty namespace — a door with a nameplate and nothing behind it.

What Might Actually Be on Port 2815

If you see port 2815 open on a machine, it isn't "LBC Measurement." It's whatever local software decided to bind there. Dynamic port allocation, development servers, game clients, and custom applications all pick ports opportunistically from the registered range. Finding 2815 active tells you something is listening; it doesn't tell you what.

How to Check What's Listening

On Linux/macOS:

# Show what's bound to port 2815
ss -tlnp sport = :2815

# Or with lsof
lsof -i :2815

On Windows:

# Show connections on port 2815
netstat -ano | findstr :2815

# Find the process by PID
tasklist | findstr <PID>

These commands show you the actual process holding the port — which is more useful than any registry entry.

Why Unassigned and Ghost Ports Matter

The port registry works only when organizations use it honestly: claim a port, document it, maintain the documentation. When registrations accumulate without documentation, the registry becomes noise. Operators can't trust that a port number means anything. Security tools that flag "unusual ports" catch less, because the signal-to-noise ratio drops.

Port 2815 is a minor case. Multiply it by thousands and you have the current state of the registered ports range: a mix of well-documented services, abandoned claims, and numbers that never got a story.