Port 1929: Bandwiz System — A Registered Port with No One Home

What Port 1929 Is

Port 1929 sits in the registered ports range (1024–49151) and carries an official IANA assignment: Bandwiz System - Server. Both TCP and UDP are registered.

Bandwiz was a company founded around 2000, based in Waltham, Massachusetts, that provided Internet software and services. At some point, someone at Bandwiz filed the paperwork with IANA to claim this port for their server software. The company is no longer active.

The port is registered. The company is gone. The port remains claimed.

The Registered Ports Range

Ports 1024–49151 are called registered ports. Unlike the well-known ports below 1024 (which require root/administrator access to bind and carry decades of established usage), registered ports are simply claimed. Any organization could historically file with IANA to reserve a number for their application.

The process was never strictly enforced. IANA doesn't verify that software actually ships, that companies stay solvent, or that the port ever sees real traffic. It's more a registry than a lock. The result: thousands of registered ports are assigned to products that were abandoned, companies that folded, or software that never shipped.

Port 1929 is one of them.

What You'll Actually Find on Port 1929

Nothing official. If you see traffic on port 1929 on a real network, it isn't Bandwiz. It's one of three things:

• Local application traffic — Some piece of software picked this port for its own purposes, possibly because it happened to be available.
• Malware or unauthorized services — Attackers sometimes use obscure registered ports precisely because they're unlikely to be filtered.
• Ephemeral port assignment — Operating systems sometimes assign outbound connections from the registered range before the formal ephemeral range kicks in, depending on configuration.

How to Check What's Listening

If you see activity on port 1929 and want to know what's responsible:

On Linux/macOS:

# Show what process is listening on port 1929
ss -tlnp | grep 1929

# Or with lsof:
lsof -i :1929

On Windows:

# Show listening processes with PIDs
netstat -ano | findstr :1929

# Then look up the PID:
tasklist | findstr <PID>

With nmap (remote scanning):

nmap -p 1929 -sV <target>

The -sV flag asks nmap to probe the port and attempt to identify the service, rather than just checking if it's open.

Why Ghost Assignments Exist

The registered ports range was designed on optimism: that organizations would register ports in good faith, build software that used them, and remain operational. In practice, companies go under, products get abandoned, and IANA's registry becomes a historical record of intentions rather than a map of current reality.

Port 1929 is a small artifact of the early Internet era — a company that registered their corner of the address space and then quietly disappeared, leaving a number in a database with no service behind it.