Port 3231: VidiGo — Broadcast Software, Quietly Registered

What Port 3231 Is

Port 3231 sits in the registered port range (1024–49151) — the middle tier of the port numbering system, where software vendors and protocol authors register services with IANA to stake a claim on a number. It operates on both TCP and UDP.

IANA assigns this port to VidiGo communication under the service name vidigo.¹

The registry contains a small ghost: the entry notes "previous was: Delta Solutions Direct." The port was originally registered by Peter Ijkhout at deltasolutions.nl — the same person, the same Dutch company, but a different name for the product. The company became VidiGo. The email in the IANA registry never changed.

What VidiGo Does

VidiGo was an Amsterdam-based company that built software for live broadcast production workflows. Their tools let broadcasters — television studios, sports arenas, radio stations — manage video content without armies of specialized technical staff. In 2015, ChyronHego, a graphics and live production technology company, acquired VidiGo.²

If you're seeing port 3231 active on a system, you're either running VidiGo/ChyronHego broadcast software in a production environment, or something unrelated has chosen to use this port. Registered doesn't mean exclusive — any application can open any port, registered or not.

The Registered Port Range

Ports 1024–49151 are where most application software lives. Unlike the well-known ports (0–1023), which are tightly controlled and require elevated privileges to open, registered ports are available to any process.

The registration system is voluntary. IANA maintains the list as a coordination mechanism — a way to reduce accidental collisions between unrelated software. But enforcement is nonexistent. Two different applications can both use port 3231 without anyone's permission, and often do.

If You're Seeing Port 3231 Open

If port 3231 appears open on a system you're investigating, it's almost certainly not VidiGo. Broadcast production software runs in television studios, not on general-purpose servers. The most useful question is: what process actually opened it?

On Linux or macOS:

# Show the process listening on port 3231
sudo lsof -i :3231

# Or with ss
sudo ss -tlnp | grep 3231

On Windows:

netstat -ano | findstr :3231

The output will include the process ID (PID). Cross-reference that with Task Manager or ps aux to identify the actual application.