Port 2075 has a name in the official registry: Newlix ServerWare Engine. IANA assigned it, gave it a service name, and moved on. Newlix ServerWare Engine, for its part, appears to have done the same — the product has almost no presence on the modern Internet.1
This is not unusual. The registered port range contains thousands of ports assigned to products that have since been discontinued, acquired, or simply abandoned. The port number outlives the software.
What Range This Port Belongs To
Port 2075 falls in the registered port range (1024–49151).
Registered ports are assigned by IANA to specific applications upon request. Anyone can apply; IANA records the assignment and publishes it. But assignment is not enforcement. No technical mechanism prevents other software from using a registered port, and IANA does not audit whether assigned software is still in active use.
The registered range is vast — over 48,000 ports. Most are occupied. Many assignments are decades old. Some, like port 2075, point to products that have effectively ceased to exist.
Known Unofficial Uses
The surrounding port range (roughly 2074–2076) appears in documentation for Speak Freely, a VoIP program used by the Internet Radio Linking Project (IRLP) — an amateur radio system for connecting repeaters over the Internet.2 Whether port 2075 specifically saw use in this context is unclear; the references are to the range, not the port.
Beyond that, there are no commonly observed unofficial uses for port 2075.
Why Unassigned and Dormant Ports Matter
A port with a stale assignment occupies a strange position: it is technically claimed, but practically available. Software vendors sometimes choose ports in this gray zone — assigned to something defunct, unlikely to conflict in practice.
This is one reason port conflicts still happen. Two applications independently decide that a dormant registered port is "safe to use," and they are both wrong.
How to Check What Is Listening on Port 2075
If you see activity on port 2075 and want to know the source:
macOS / Linux:
Windows:
The process ID returned can be cross-referenced against your running processes to identify the software.
If something is actively listening on port 2075 on your system, it is almost certainly not Newlix ServerWare Engine.
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