Port 1239 is used for the NTP (Network Time Protocol) control message protocol. It is used for time synchronization between network devices.
Ports those registered with IANA are shown as official ports. The same port number may be unofficialy used by various services or applications. The official usage are listed separately below its usage may change from time to time.
Official
| Port | Protocol (TCP/UDP) | Title | Description | Port Type |
| Port 1239 | tcp | nmsd | NMSD | REGISTERED PORT |
| Port 1239 | udp | nmsd | NMSD | REGISTERED PORT |
UnOfficial
Unofficialy or sometimes with conflict, the same port may be used by different applications.
| Port | Protocol (TCP/UDP) | Description |