Port 1350 is registered to something called "Registrant Corporation"—a service from Databeam Corporation, a company that specialized in conferencing and collaboration standards in the 1990s.
The company doesn't exist anymore. Databeam was acquired. The service isn't running anywhere. But the port number? Still registered. Still sitting there in the IANA database, waiting for traffic that will never come.
What Registrant Corporation Was
Databeam specialized in real-time collaboration protocols. In the mid-1990s, they built toolkits that let developers add multipoint conferencing and data sharing to applications. They worked on T.120—an International Telecommunications Union standard for multipoint data communications.1
Port 1350 was registered for "Registrant Corporation," though details about what this specific service actually did are lost to time. The company registered the port, built something, and then disappeared into the acquisition wave of the late 1990s.
The Ghost Port Problem
The IANA port registry is full of these. Ports claimed by companies that got acquired, protocols that never caught on, standards that lost to better ideas. Once a port is registered, it stays registered—even when the service dies, even when the company vanishes.
Port 1350 is one of them. Officially assigned. Practically unused.
What This Port Tells You
If you see traffic on port 1350, it's probably not Databeam's old collaboration protocol. It's either:
- Custom software that happened to pick this port number
- Malware that chose an obscure registered port to blend in
- A misconfiguration where something bound to the wrong port
On Linux or macOS:
On Windows:
Why Dead Ports Matter
Port 1350 sits in the registered ports range (1024-49151)—ports that IANA assigns to specific services on request.2 These registrations are meant to prevent conflicts. If you're building a protocol, you register a port so nobody else uses it.
But what happens when your protocol dies? The port stays registered. Forever. A permanent placeholder for something that no longer exists.
It's a problem of permanence. The Internet remembers. Even when we forget.
Related Ports
Other collaboration and conferencing ports that actually survived:
- Port 1720 — H.323 call signaling (used for VoIP and video conferencing)
- Port 5060 — SIP (Session Initiation Protocol, the standard that won)
- Port 3478 — STUN (used by WebRTC for NAT traversal)
These ports carry real traffic. Port 1350 doesn't.
Frequently Asked Questions
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