Port 2694: pwrsevent — Assigned, Undocumented

What This Port Is

Port 2694 sits in the registered ports range (1024–49151). These ports are formally tracked by IANA — the Internet Assigned Numbers Authority, the organization that coordinates port number assignments globally — and are intended for specific services registered by individuals or organizations.

Unlike well-known ports (0–1023), which require IANA review and are reserved for foundational protocols like HTTP and SSH, registered ports can be claimed by anyone with a legitimate service to name. The process is lighter-weight, and the results are sometimes... sparse.

The IANA Assignment: pwrsevent

According to the IANA Service Name and Transport Protocol Port Number Registry, port 2694 (both TCP and UDP) is assigned to a service called pwrsevent, registered by Yoshinobu Nakamura.¹

That's the complete public record. No RFC. No protocol specification. No description beyond the name itself.

The name suggests power service events — possibly a daemon or agent meant to broadcast or receive power state notifications across a network (think UPS events, power failure alerts, battery status). But that's inference from etymology, not documentation. Whatever was planned or built was never publicly described.

What This Means in Practice

An IANA registration doesn't mean software is actually using a port. It means someone reserved it, the way you might register a domain name for a project that never launched. Port 2694 has a nameplate. Whether it ever had a house is unknown.

If you see port 2694 active on a system, it's almost certainly an application that chose the port informally — a developer who needed a port, checked that 2694 wasn't famous for anything bad, and started listening. That's entirely normal and legal. The registered name has no enforcement mechanism.

Checking What's Using This Port

If port 2694 shows up on your network, find out what's actually there:

On Linux or macOS:

# See what process is listening on port 2694
sudo ss -tlnp | grep 2694

# Or with lsof
sudo lsof -i :2694

On Windows:

netstat -ano | findstr :2694

Then match the PID (process ID) to a process name using Task Manager or tasklist.

Remotely:

# Check if the port is open on a remote host
nmap -p 2694 <hostname-or-ip>

Why These Ports Matter

The registered ports range is both useful and noisy. Useful because it gives well-behaved software a way to claim a stable, non-conflicting port number. Noisy because many registrations — like this one — were made without accompanying documentation, leaving a trail of names that mean something to their registrant and nothing to anyone else.

This is also why port scanning matters for network security: a surprising number of ports in the registered range carry active services that aren't what IANA says they are, or that IANA has simply never heard of.