Port 1927: Videte CIPC — Registered, Forgotten

What Range This Port Belongs To

Port 1927 sits in the registered ports range: 1024 to 49151.

This range works differently from the well-known ports (0–1023). You don't need special OS privileges to bind to a registered port. Any application running as a normal user can open a socket here. IANA maintains a registry of assignments in this range, but the assignments are advisory — not enforced. Two applications can claim the same port. One can register a port and never ship a product.

Port 1927 falls into that second category.

The Official Assignment: Videte CIPC

According to the IANA registry, port 1927 (both TCP and UDP) is assigned to "videte-cipc-port" — registered by Videte IT, a German company specializing in security and analytics software.¹

What "CIPC" stands for in this context isn't publicly documented. The product appears to have never gained traction, and there's no documentation, no open-source code, no forum posts, no support tickets about it anywhere on the public Internet.

The registration exists. The product, for practical purposes, does not.

In Practice

No widely deployed software is known to use port 1927. It doesn't appear in common threat databases, isn't associated with any known malware, and isn't listed in firewall rulesets for any major application. If you see traffic on port 1927, it's almost certainly something running locally on your own systems — custom software, an internal tool, or a developer who picked an arbitrary port and happened to land here.

How to Check What's Listening on This Port

Linux / macOS:

# Using ss (modern, fast)
ss -tlnp | grep 1927

# Using lsof
lsof -i :1927

# Using netstat
netstat -an | grep 1927

Windows:

netstat -ano | findstr 1927

The PID in the output maps to a running process. Cross-reference it with Task Manager or tasklist /fi "pid eq [PID]" to see what's actually there.

Why Unassigned (or Forgotten) Ports Matter

The registered ports range is 48,128 ports wide. IANA has assigned only a fraction of them. The rest — and the ghost assignments like this one — form the quiet majority of the port space.

This matters for a few reasons:

Security scanning relies on port registries. A port with no known service is a signal worth noticing. If something is listening on 1927 unexpectedly, the right response is curiosity, not assumption.

Application developers reach for ports in this range when they need something for internal communication, development servers, or custom protocols. Picking an unoccupied port is good practice. Picking one that's technically registered to something obscure (like 1927) is low-risk but slightly untidy.

The registry itself is a living document that reflects decades of software history — products that shipped, products that didn't, companies that registered ports and then disappeared. Port 1927 is a small artifact of that history.