Development Port Selection Reference
A reference for selecting development ports, not a device scan or a guarantee of availability. Check known uses, inspect local listeners, then verify the application can bind.
Registry assignments, software defaults and local listeners are different things. A port number alone does not identify or secure a service.
Database coverage, not network utilization
Counts are distinct port numbers in the current database, with inclusive bounds. They do not measure devices, users or real conflicts. Unlisted does not mean unassigned, unused or safe.
| Example range | Recorded port numbers | Numbers in range |
|---|---|---|
| 3000–3999 | 13 | 1000 |
| 4000–4999 | 22 | 1000 |
| 5000–5999 | 33 | 1000 |
| 9000–9999 | 40 | 1000 |
Example candidates: check before use
These numbers demonstrate lookup and configuration. They are not guaranteed free ports and have no inferred conflict probability. Follow a link to inspect existing records.