Port 1892 sits in the registered ports range — the middle tier of the port address space, spanning 1024 to 49151. These ports are assigned by IANA upon application, meaning someone had to request this number, provide a name, and be accepted into the registry.
Port 1892 was registered to ChildKey Control (childkey-ctrl), a parental control application, assigned to an individual named Ivan Berardinelli on both TCP and UDP. That is the full extent of what the official record says.1
The software itself has no detectable presence today. No active website. No documentation. No user reports in any forum. No product page, no download, no support thread. ChildKey Control appears to have come and gone without leaving much of a mark on the Internet it was registered to communicate over.
What the Registered Range Means
Registered ports (1024–49151) are not the wild-open ephemeral range, and they are not the tightly controlled well-known ports below 1024. They occupy the middle ground: organized enough to require an IANA application, but common enough that you will find thousands of them assigned to software ranging from major enterprise systems to long-abandoned personal projects.
The registration does not mean the software is still running on your network. It means that, at some point, someone asked IANA to reserve this number for their use, and IANA obliged. The reservation is permanent unless explicitly revoked.
Why This Matters
Most port scanners and security tools use the IANA registry to label what they find. If you see traffic on port 1892, the label "ChildKey Control" will appear in their output — even if what is actually running there has nothing to do with parental monitoring software from a decade ago.
Unverified labels on obscure registered ports are one of the small, persistent noise sources in network security. The number looks accounted for. The reality may be completely different.
Checking What Is Actually Listening
If you see activity on port 1892 on your system, the label tells you little. Check what is actually there:
On Linux or macOS:
On Windows:
The process name and PID that comes back is what matters — not what the IANA registry says should be there.
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