Port 11997 is not assigned to any specific service or protocol by the Internet Assigned Numbers Authority (IANA). It may be used by certain applications or software for communication purposes, but without further information on the context, it is impossible to determine its exact usage.
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 11997 | sctp | wmereceiving | WorldMailExpress | REGISTERED PORT |
UnOfficial
Unofficialy or sometimes with conflict, the same port may be used by different applications.
| Port | Protocol (TCP/UDP) | Description |