Port 3499: SccIP Media — A Ghost in the Registry

What Port 3499 Is

Port 3499 sits in the registered ports range (1024–49151), the middle tier of the port number space. Unlike well-known ports (0–1023), which require root privileges to bind and carry the Internet's foundational protocols, registered ports are claimed through IANA paperwork. Any organization can register a port for a named service. Many do. Most of those services never achieve widespread use.

Port 3499 is registered for SccIP Media on both TCP and UDP.¹

The SccIP Story

The registration dates to May 2002, filed by David Yon at Dialout.net. "SccIP" appears to be the IP-based media component of an early conferencing protocol effort that emerged from the IETF's MMUSIC (Multiparty Multimedia Session Control) working group. The early 2000s were a fertile and chaotic period for VoIP and conferencing protocols — SIP was still consolidating, H.323 was the incumbent, and a half-dozen alternative frameworks were being proposed.

SccIP was registered at the right moment to look promising. It did not survive the consolidation. SIP won. The port registration remains, unchanged, a 2002 timestamp on a protocol that quietly stopped existing.²

There are no known applications actively using port 3499 today. No major software packages, no open-source implementations, no security advisories. If you see traffic on this port in the wild, it is not SccIP Media.

What You Might Actually Find on Port 3499

If a process is listening on port 3499 on your system or a system you're monitoring, it is almost certainly:

• A development server bound to this port by coincidence or configuration
• A custom internal application that picked a high registered port at random
• Malware using an obscure port to avoid detection (registered ports in the 3000s are occasionally used for this)

None of these are related to SccIP.

How to Check What's Listening

On Linux/macOS:

# Show what process is using port 3499
ss -tlnp | grep 3499

# Alternative with lsof
lsof -i :3499

On Windows:

netstat -ano | findstr :3499

The process ID in the output can be matched against Task Manager or tasklist to identify the application.

Why Registered Ports Matter

The registered port range was designed so organizations could claim a consistent port number for their services without conflicting with others. The mechanism worked, in a narrow sense — port 3499 was never assigned to two services simultaneously. But it also produced a registry full of ports like this one: claimed, never used, never released.

IANA has no active reclamation process for dormant registrations. SccIP Media will sit at port 3499 indefinitely, a placeholder for a protocol that never shipped.