What Range Is This Port In?
Port 1013 falls within the well-known ports range (0-1023), the Internet's VIP section. These ports are assigned by the [Internet Assigned Numbers Authority (IANA)]1 for standard, established services. SSH lives at 22. HTTP at 80. HTTPS at 443. If you use the Internet, you're flowing through well-known ports constantly.
Port 1013 is technically in this range. But it has no assigned service.
Is It Reserved or Unassigned?
Port 1013 is unassigned. The [GRC Port Authority]2 and [SpeedGuide]3 databases both confirm: no standard service. No registered protocol. Nothing.
It belongs to the well-known range, which means it's not available for random applications to claim. But nothing has claimed it, either. It's a gap.
Why Does This Matter?
Unassigned ports in the well-known range represent something important: the Internet keeps reserved space. Not every port gets used. Some remain deliberately empty, available for future standardization if a new critical protocol emerges that deserves a well-known port number.
Ports 0-1023 are finite and valuable. Leaving some unassigned is a form of strategic restraint—acknowledging that not everything should be here, and some space should be held in case something genuinely important needs it.
How to Check What's Listening on Port 1013
To see if anything is actually using this port on your system:
On macOS or Linux:
On Windows:
Cross-platform (requires root/admin):
Most likely, you'll see nothing. Port 1013 is quiet.
The Lesson of Unassigned Ports
The well-known range is crowded but not full. Unassigned ports are the quiet spaces where the Internet remembers that some things shouldn't be rushed. Port 1013 is one of those spaces—held in reserve, waiting for something worthy, or simply left undisturbed because nothing ever needed it.
It's a reminder that even in a system designed to connect everything, some spaces stay empty.
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