What Port 3295 Is
Port 3295 sits in the registered port range (1024–49151) — the middle tier of the port numbering system, below the well-known ports that carry HTTP, SSH, and DNS, and above the ephemeral ports that operating systems assign on the fly to outbound connections.
IANA lists port 3295 as assigned to a service called "dyniplookup" (Dynamic IP Lookup) on both TCP and UDP.1 That is essentially everything officially known about it.
There is no RFC. There is no public specification. There is no community of software built around it. The name exists in the registry the way a business name sometimes exists on paper long after the business has closed.
The Registered Port Promise
When IANA assigns a name to a port, the expectation is that an entity has requested it for a real protocol — one that will be documented, deployed, and maintained. Sometimes that happens. Sometimes a port gets a name and nothing else follows.
Port 3295 appears to be the latter. It is registered in the sense that a row exists in a spreadsheet somewhere. It is not registered in the sense of being part of an active, documented protocol that software actually uses.
This is not unusual. The registered port range contains thousands of entries, and a meaningful fraction of them are placeholder names for services that never gained traction, were replaced, or were simply forgotten.
Known Unofficial Uses
Xposure trojan. The most concrete real-world association for port 3295 is with a trojan horse program called Xposure, which used this port for remote access.2 This dates to the early 2000s era of Windows trojans — historically significant as a security note, not a current active threat.
If you find unexpected traffic on port 3295 today, the trojan association is old enough that it is unlikely to be the explanation. More probably it is an application that chose the port arbitrarily or a misconfigured service.
How to Check What Is Listening
On Linux or macOS:
On Windows:
Then match the process ID (PID) against Task Manager or:
If something is listening on 3295 and you don't recognize it, finding the owning process is the right next step — not the port number itself.
Why This Port Matters (Even Though It Doesn't)
Port 3295 is a useful reminder of how the port system actually works in practice. The registered range is not a curated library of active, documented protocols. It is a registry — some entries are rich, some are thin, some are effectively empty.
When troubleshooting network traffic, an unfamiliar port number that traces back to a vague IANA name often tells you less than simply finding what process is holding it open. The name is a starting point, not an answer.
Frequently Asked Questions
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