Dictionary · Protocols and Ports
Registered Ports
Ports · Intermediate
Port numbers from 1024 through 49151 that can be registered for applications. Many products use them by convention, but registration does not prevent another program from choosing the same number.
This middle range holds many application defaults, including some remote-access and database tools. Treat the number as a clue and confirm the actual service.
Example: Graphical remote desktop commonly uses 3389, which sits in this range rather than the lowest system range.
Common misconception
- Registered does not mean a firewall should leave the port open. It only means the number is in the application range.