Port 1946: tekpls — A Registered Port with No Story

What Port 1946 Is

Port 1946 sits in the registered ports range — numbers 1024 through 49151, managed by the Internet Assigned Numbers Authority (IANA). Unlike the well-known ports below 1024 (where HTTP, SSH, and DNS live), registered ports are available to any application or individual who files a request with IANA. You fill out a form, propose a name, and if the slot is open, the entry appears in the official registry.¹

Port 1946 has such an entry. The registered service name is tekpls, assigned to both TCP and UDP. The registrant is listed as Brian Abramson.

That is the entirety of the public record.

The Ghost Registration Problem

The IANA registry contains thousands of entries like this one: a port number, a service name, a registrant contact, and nothing else. No RFC. No documentation. No known deployments. No software that announces itself by this name.

"Tekpls" doesn't appear in any protocol specification, open-source codebase, or technical documentation that's publicly searchable. It may have been registered for an internal tool, a commercial product that never shipped, a project that ended before it began, or simply as a placeholder. IANA registrations don't expire, so these ghost entries persist indefinitely.²

This isn't unusual. It's a structural feature of the registered ports range. Registration is easy; building something that actually uses the port is hard. The registry reflects ambition more than reality.

Is Anything Actually Running on Port 1946?

Almost certainly not tekpls — whatever that is. But something might be. Unassigned and obscurely-assigned ports get used opportunistically:

• Development servers picking an available port
• Internal tooling that never needed a public registration
• Malware choosing an obscure port to avoid detection

Port scanners occasionally flag 1946 for inspection, not because of any known threat association, but because unexpected open ports are worth understanding.

How to Check What's Listening

If you see traffic on port 1946 and want to know what's using it:

On Linux or macOS:

ss -tlnp | grep 1946
# or
lsof -i :1946

On Windows:

netstat -ano | findstr :1946
# Then look up the PID:
tasklist | findstr <PID>

These commands show you the process behind any open port. If something is listening on 1946, you'll know what it is within seconds.

Why Unassigned Ports Matter

The port system only works when applications coordinate. Well-known ports work because everyone agrees: port 443 is HTTPS, port 22 is SSH, port 25 is SMTP. No negotiation required.

The registered ports range was meant to extend that coordination — a place for less universal services to claim a consistent number. But the low barrier to registration created a commons tragedy of sorts: thousands of registrations that don't correspond to running software, fragmenting the coordination the system was meant to provide.

Port 1946 is a small example of that. Registered. Named. Essentially unclaimed.