Port 1670 sits in the registered ports range—that middle territory between the well-known ports (0-1023) that run the Internet's core services and the ephemeral ports (49152-65535) that your computer assigns on the fly. It's numbered, it's referenced, but its story is quieter than most.
What the Databases Say
Various port reference databases list port 1670 as assigned to mySQLtribe, described as a service for sharing MySQL databases.12 Both TCP and UDP protocols are mentioned, though the service primarily used TCP.
But here's the thing: try to find information about mySQLtribe today, and you'll come up mostly empty. The service existed, someone registered the port, and then the service faded into obscurity. The port number remains in reference lists, but the service it was meant for has largely disappeared from the Internet.
The Registered Ports Range
Port 1670 belongs to the registered ports range (1024-49151). These ports are maintained by IANA—the Internet Assigned Numbers Authority—and can be registered by organizations or developers for specific services.3
Unlike well-known ports, which require a formal RFC and widespread adoption, registered ports can be claimed by anyone with a legitimate service. You submit an application to IANA, describe your service, and if approved, you get your port number.
This is how we end up with thousands of registered ports, many of which—like 1670—serve services that never achieved widespread adoption or have since been discontinued.
What This Port Teaches Us
Port 1670 is a reminder that port numbers outlive the services they were created for. Someone built mySQLtribe, thought it would matter enough to register a port, and moved on. The Internet kept the record.
In the grand port registry, there are hundreds of these quiet entries—ports assigned to services that never took off, protocols that were superseded by better alternatives, or companies that simply closed down. The ports remain reserved, their numbers sitting in databases, waiting for traffic that rarely comes.
Checking What's Actually Using Port 1670
If you want to see what's actually listening on port 1670 on your system, you can check:
On Linux or macOS:
On Windows:
Most likely, you'll find nothing. Port 1670 is probably sitting idle on your machine, just as it is on millions of others.
Why Unassigned and Obscure Ports Matter
The existence of ports like 1670 matters for the overall health of the port system. Every registered port, even one for a dead service, is a port that isn't available for something else without potential conflict.
IANA maintains this registry not because every port is actively used, but because the alternative—allowing ports to be claimed randomly without coordination—would create chaos. Better to have a clean record of what was assigned, even if the service is gone, than to risk collision when a new service picks the same number.
Port 1670 is one of thousands of these registered-but-quiet ports. It's not broken. It's not a security risk. It's just there, holding a spot in the registry for a service that once was.
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