What This Port Is
Port 2764 sits in the registered ports range (1024–49151). These ports are managed by IANA, the Internet Assigned Numbers Authority, and applications or vendors can formally register a port number for their service. Registration doesn't require shipping software — just filling out a form and providing a contact.
Port 2764 is registered for both TCP and UDP under the service name data-insurance, with Brent Irwin listed as the assignee.1 That's the entirety of what's publicly known. There's no RFC, no documentation, no software that's been observed using this port in the wild.
Ghost Registrations
This is more common than you'd expect. The IANA registry contains thousands of entries. Some represent protocols used by millions of devices daily. Others are like port 2764: assigned at some point in time, then gone quiet. The product may have never shipped. The company may have folded. The protocol may have lived entirely inside a private network and never touched the public Internet.
The registered ports range was designed to prevent collisions — if your software picks a port, you register it so nothing else claims the same number. But registration doesn't guarantee a protocol ever existed, let alone survived. These are the orphaned claims of the port namespace.
What You'd Actually Find Here
If you see traffic on port 2764 on your network, it's almost certainly not "data-insurance." More likely candidates:
- A development server or internal tool that picked this port arbitrarily
- A game or application that chose a registered-but-unused port to avoid conflicts
- Scanning activity from automated tools probing the port range
How to Check What's Listening
If port 2764 is open on your system, these commands will tell you what's using it:
Linux / macOS:
Windows (Command Prompt as Administrator):
The output will show the process ID (PID). Cross-reference that with your process list to find the actual application.
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