The Mystery of FTRANHC
Port 1105 is officially registered with IANA for a service called "FTRANHC" on both TCP and UDP.1 The registration exists. The port number is assigned. But the protocol itself? Lost to time.
No one seems to know what FTRANHC stands for. There's no RFC documenting it. No specification explaining how it works. The acronym doesn't appear in comprehensive networking glossaries. The only evidence it ever existed comes from registry entries and firewall logs from the mid-2000s, where users reported seeing "FTRANHC" alerts when browsing the web.2
This is a ghost port—officially assigned but functionally abandoned.
What Port 1105 Actually Carries Today
In practice, port 1105 is unassigned in the way that matters: nothing uses it. You won't find production services listening here. Network scans show it consistently closed. The service FTRANHC was registered for either never launched, never gained adoption, or quietly disappeared without anyone noticing.
Some registered ports become essential infrastructure (like HTTPS on 443 or SSH on 22). Others get registered with good intentions and then vanish. Port 1105 is the latter—a name in a database, nothing more.
The Registered Ports Range
Port 1105 falls in the registered ports range (1024-49151), where IANA assigns port numbers to specific services upon request. This range sits between:
- Well-known ports (0-1023): Reserved for common services, require elevated privileges
- Dynamic/ephemeral ports (49152-65535): Temporary ports used by client applications
Getting a port in the registered range means someone, at some point, applied to IANA with a service name and description. They got approval. Port 1105 became FTRANHC. And then... nothing. The service never materialized, or it did and no one used it.
Why This Matters
The existence of ports like 1105 reveals something about how the Internet's infrastructure works: once assigned, port numbers stay assigned. There's no cleanup mechanism for abandoned services. No process for reclaiming ports that never got used.
IANA has over 65,000 port numbers to work with, so there's no shortage. But it means the registry contains archaeological layers—services from decades past, protocols that sounded important in 1995 but never caught on, acronyms whose meanings have been forgotten.
Port 1105 is one of those layers. A fossil in the registry. A reminder that not every port number becomes part of the Internet's living infrastructure.
How to Check What's on Port 1105
Even though FTRANHC is officially assigned here, you can check if anything is actually listening on port 1105 on your system:
On Linux/macOS:
On Windows:
Most likely, you'll find nothing. Port 1105 exists in the registry but not in practice—a ghost in the machine.
Frequently Asked Questions About Port 1105
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