What Port 2920 Is
Port 2920 sits in the registered ports range (1024–49151). These ports are assigned by the Internet Assigned Numbers Authority (IANA) to specific services and applications — not reserved like the well-known ports below 1024, but formally documented so software authors don't accidentally collide.1
The official assignee is roboEDA, listed for both TCP and UDP. EDA stands for Electronic Design Automation — software used to design integrated circuits and printed circuit boards. roboEDA appears to have been a tool in that space at some point. Today it has no public presence, no active documentation, and no community. The registration lives on; the software apparently doesn't.
This is not unusual. The registered port space is full of similar relics: software that was actively developed, needed a port number, filed with IANA, then faded. The registration stays indefinitely.
What This Means Practically
If you see traffic on port 2920, it's almost certainly not roboEDA. It's more likely:
- A custom application that chose this port arbitrarily
- A misconfigured service that defaulted here
- Something worth investigating
Unlike the well-known ports (0–1023), there's no enforcement here — any software can use any registered port. The IANA assignment is a courtesy, not a lock.
How to Check What's Listening
On Linux or macOS:
On Windows:
These commands show you the process ID of whatever is listening. From the PID you can identify the actual software — which is the only honest answer to "what's on this port?" for any port in this range.
Why Unassigned-in-Practice Ports Matter
The registered port space is a shared namespace. When a port is formally claimed by an obscure or defunct tool, it creates mild friction: firewall rules get written against the registered service name that doesn't actually run, or conversely, real traffic gets flagged because the port "belongs to" something else.
Port 2920 is a small example of a larger truth about the port registry: it reflects history as much as current reality. The Internet keeps running on infrastructure designed in the 1970s and 1980s, and the port numbering system carries the sediment of every application that ever needed a number.
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