Port 1310 sits in a curious place in the Internet's port registry. It's officially registered to a service called "Husky," but finding what that actually means requires following a trail that mostly goes cold.
What Is Port 1310?
Port 1310 is a registered port in the range 1024-49151. IANA lists it as assigned to "Husky" for both TCP and UDP, with a contact named Mark Zang.1 That's where the official record ends.
The speculation begins in forum posts and port databases: Husky might be a company in Canada that created a protocol called SmartLink, used to connect injection molded plastic factory hardware to a centralized server called a Husky host.2 But there's nothing—no RFC, no public documentation, no company website—that definitively ties port 1310 to this protocol.
The Registered Ports Range
Port 1310 belongs to the registered ports (1024-49151). This range is where:
- Companies and developers can register ports with IANA for specific applications
- Registration doesn't require an RFC or public standard
- Many ports are assigned but never widely documented or used
- Services can disappear while their port assignments remain
Unlike well-known ports (0-1023) which require RFCs and widespread adoption, registered ports can be claimed by anyone with a legitimate use case. Some become essential infrastructure. Others, like 1310, become archaeological mysteries.
What Might Be Using Port 1310
Industrial automation equipment — If the Husky/SmartLink connection is real, you might see port 1310 on networks with plastic injection molding equipment, particularly older systems.
Ephemeral connections — Because 1310 falls in a range Windows systems commonly use for temporary outbound connections, seeing this port in network logs might just mean a client opened a random high port to connect somewhere else.3
Historical malware — Port databases flag 1310 as previously used by trojans, though this doesn't mean current traffic is malicious—just that malware has opportunistically used this unmonitored port in the past.4
How to Check What's Listening
On Linux or macOS:
On Windows:
If something is listening on 1310 and you don't know why, that's worth investigating. Legitimate registered services should be documented in your system's configuration. Unknown listeners could be anything from forgotten industrial software to something malicious.
Why Obscure Ports Matter
Port 1310 represents thousands of ports in the registry: officially assigned, minimally documented, possibly abandoned. They matter because:
They're part of the historical record — Someone registered this port for a real purpose, even if that purpose is now obscure. The Internet's port registry is an archive of every network protocol someone thought important enough to claim a number for.
They create blind spots — Security tools focus on well-known ports. Obscure registered ports can be exploited precisely because no one's watching them closely.
They show how the Internet evolved — Not every protocol becomes HTTP or SSH. Most fade into obscurity. The registry preserves their existence even when documentation doesn't.
The Honest Truth
We don't really know what port 1310 is for. IANA says "Husky." Forum posts say maybe SmartLink for injection molding equipment. The trail ends there.
This is normal. The port registry contains 49,151 numbers. Most of them tell stories we can no longer fully reconstruct. Port 1310 is one of thousands of ghosts in the machine—registered, assigned, but no longer explained.
If you find it on your network, you'll need to investigate locally. The Internet's collective memory has forgotten what it was supposed to remember about this port.
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