What Port 3179 Is
Port 3179 is registered with IANA under the name H2GF W.2m Handover Protocol (service name: h2gf-w-2m), assigned to both TCP and UDP. The registrant contact is an Ericsson engineer.
That's almost all that's publicly known about it.
The name suggests a wireless handover function — "W.2m" may reference a WLAN interface standard, and handover protocols coordinate the transfer of an active connection from one access point or cell to another. These are the protocols that decide, in milliseconds, that your phone should switch towers without dropping your call. But the specific technical specification for H2GF W.2m, if it ever existed publicly, isn't findable in standards bodies, RFCs, or open documentation. It was registered, and then went quiet.
What "Registered" Actually Means
The registered ports range runs from 1024 to 49151. Unlike well-known ports (0–1023), which are reserved for foundational Internet services and require IANA approval to use, registered ports are simply recorded in the IANA registry when an organization submits an application. Registration signals intent and prevents obvious conflicts — it doesn't require the protocol to be open, widely deployed, or even actively used.
Port 3179 falls squarely in this category: officially registered, operationally invisible.
What You're Likely to Find on Port 3179
Almost certainly nothing. The H2GF handover protocol, if it runs at all, would appear only inside Ericsson's internal telecom infrastructure — not on general-purpose servers or home networks.
If you see something listening on port 3179, it's far more likely to be a custom application or service that chose the port arbitrarily than any implementation of the registered protocol.
How to Check What's Listening
If any of these return results, the process name and PID will tell you what's actually using the port on your system.
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