65535
UINT16_MAX / highest port
The largest unsigned 16-bit integer (2^16 - 1, 0xFFFF). Among other things, the highest possible TCP/UDP port number.
Similar magic numbers
| value | name | category |
|---|---|---|
| 50 45 53 54 | PestPatrol data-scan strings | file-signature |
| 6F 3C | SMS text (SIM) | file-signature |
| 6379 | Redis port | port |
| 60 EA | Compressed archive file | file-signature |
| 66 74 79 70 33 67 70 35 | MPEG-4 video file | file-signature |