Port 379 is unassigned. It has no official protocol, no RFC, no service registered with IANA. It exists as a number in the well-known ports range, but nothing claims it.
What Range This Port Belongs To
Port 379 falls in the well-known ports range (0-1023), also called system ports.1 These are the ports IANA reserves for fundamental Internet services—the ports that require IETF Review or IESG Approval to assign, the ports that on most systems can only be bound by root processes or privileged users.
This is the range where SSH lives (port 22), where HTTPS lives (port 443), where the protocols that hold the Internet together make their home. About 76% of the ports in this range have official assignments.2
Port 379 is part of the other 24%.
What Unassigned Means
When a port is unassigned, it means:
- No official protocol claims it — IANA has not registered a service for this port number
- It can be assigned later — The space is reserved and available for future assignment through proper channels
- It may be used unofficially — Applications can technically listen on any port, assigned or not
- It shouldn't be relied upon — Without an official assignment, there's no guarantee against conflicts
The well-known ports range is managed conservatively. Getting a port assigned here requires going through the IETF standards process. Port 379 has never made it through that door.
Known Unofficial Uses
Port 379 has appeared in security databases as a port historically associated with malware activity.3 A trojan or virus used this port at some point to communicate. This doesn't mean the port itself is malicious—it means that in the absence of an official service, malware found an empty room and moved in.
This is common with unassigned ports. When there's no legitimate service to conflict with, they become attractive to software that doesn't want to be noticed.
Beyond that historical security flag, there's no evidence of widespread unofficial use. Port 379 is mostly quiet.
How to Check What's Listening
To see if anything is listening on port 379 on your system:
On Linux/macOS:
On Windows:
If nothing returns, the port is closed. If something appears, you'll see the process ID and can investigate what's using it.
Why Unassigned Ports Matter
The Internet has 65,535 ports per protocol (TCP and UDP). Not all of them need to be filled. The unassigned ports are breathing room—space for future protocols, space for experimentation, space for applications that don't need global coordination.
Port 379 sits in the most restricted range, the range where every assignment is supposed to matter. That it remains unassigned after decades suggests either:
- No protocol emerged that needed this specific number
- Proposals were made but didn't meet the standards for assignment
- The space is being held for future use
The well-known ports range is finite and precious. Every unassigned port is a choice—a decision that this number doesn't yet have a purpose worthy of permanent reservation.
Port 379 is one of those choices. A number without a name. A door without a service behind it.
For now, it waits.
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