Port 2844: BPCP POLL — The Port with a Name and No Story

What Range This Port Belongs To

Port 2844 falls in the registered ports range (1024–49151). These ports are formally managed by IANA — the Internet Assigned Numbers Authority, the organization responsible for coordinating port assignments globally.

Registered ports are different from the well-known ports below 1024 (where HTTP, SSH, and DNS live) and different from the ephemeral ports above 49151 (which operating systems assign on the fly for outgoing connections). Registered ports are supposed to be reserved for specific services by request. A vendor or protocol designer asks IANA, IANA records it, and from that point forward the port has an official owner.

In theory.

The Ghost Registration

Port 2844 is listed in the IANA registry as bpcp-poll — "BPCP POLL" — for both TCP and UDP.¹

That's where the trail ends.

No RFC backs this assignment. No widely deployed software claims it. No meaningful public documentation explains what "BPCP" stands for in this context or what the polling protocol does. The name exists in the registry, but the protocol behind it is effectively invisible.

This happens more often than you might expect. The IANA registry reflects decades of assignment requests — some from protocols that shipped and thrived, some from protocols that were planned and abandoned, and some from services so niche or proprietary that they never left a public trace. Port 2844 appears to fall into the latter category.

There are no significant security associations with port 2844. It does not appear on common lists of trojan or malware ports. If something is actively listening on port 2844 on your machine, it's almost certainly application-specific — not a known threat, and not a known protocol.

How to Check What's Listening

If you see port 2844 active on a system and want to know why:

On Linux or macOS:

sudo lsof -i :2844
sudo ss -tlnp | grep 2844

On Windows:

netstat -ano | findstr :2844

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

# macOS/Linux
ps aux | grep <PID>

# Windows
tasklist | findstr <PID>

The process name will tell you what's actually using the port. From there you can decide whether it belongs.

Why Unassigned (and Ghost) Ports Matter

The registered port range contains 48,127 slots. Not all of them are filled, and not all that are filled are active. Some assignments are decades old and refer to software no one runs anymore. Some refer to internal enterprise tools that registered a port but never published documentation.

This matters for two reasons:

Security scanning: When a scanner probes your network, every open port is a question mark until answered. A ghost registration like bpcp-poll offers no reassurance — if something claims this port, you still need to verify it.

Port conflicts: Applications that need a port sometimes pick registered-but-dormant ones, gambling that nothing else will be using them. That gamble usually pays off. Port 2844 is quiet enough that it's a reasonable choice for an internal service that needs a stable number.

The port list is not a map of what's running. It's a reservation system. Many reservations go unused. Some names in the list are ghosts.