Port 1485: LANSource — A ghost in the registry

What Is Port 1485?

Port 1485 is registered to LANSource, a protocol created by Doug Scott and assigned by IANA for both TCP and UDP.¹ That's essentially all we know about it.

The protocol appears to date from the mid-1990s, but there's no documentation about what it actually did, no active implementations, no community of users. LANSource registered its port number and then vanished from the Internet's collective memory.

The Registered Port Range

Port 1485 sits in the registered port range (1024-49151). These ports are assigned by IANA to specific services upon request. Unlike well-known ports (0-1023), you don't need special privileges to run a service on a registered port. Unlike dynamic ports (49152-65535), these numbers aren't randomly assigned—they're claimed.

Anyone can apply to IANA for a registered port. You submit your protocol name, describe what it does, and if approved, that number becomes yours. Forever.

What This Port Teaches Us

Port 1485 is a lesson in the permanence of infrastructure decisions. Someone in the 1990s thought LANSource was important enough to register a port number. They went through the IANA process. They got their number.

And then the protocol disappeared.

But the port number? Still registered. Still reserved. Still sitting in IANA's official registry² decades after anyone last used it. This is the registry's fundamental tension—it must be stable enough that port numbers never conflict, which means it must remember everything, even the things nobody uses anymore.

Most registered ports are like this. Not the famous ones—not the services still running on millions of servers—but the thousands of ports claimed by protocols that seemed promising at the time and then faded into irrelevance.

Is Anything Using Port 1485?

Probably not. But you can check what's listening on any port on your system:

Linux/Mac:

sudo lsof -i :1485

Windows:

netstat -an | findstr :1485

If you find something listening on 1485, it's either a very old piece of software or something using the port for unofficial purposes—since the official protocol is effectively extinct.

Why Unassigned and Forgotten Ports Matter

The port number system only works because it's permanent. Port 443 will always be HTTPS. Port 22 will always be SSH. And port 1485 will always be LANSource, even though LANSource is gone.

This permanence creates the stability that lets the Internet function. But it also means the registry slowly fills with ghosts—claimed numbers that nobody uses anymore but that can never be reclaimed.

Port 1485 is one of those ghosts. A small monument to a protocol someone once cared about enough to register. And now all that remains is a number in a database, and a name without a story.