Port 1100 is not assigned to any specific service or application by the Internet Assigned Numbers Authority (IANA). It may be used by some proprietary software or internal network configurations.
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 1100 | tcp | mctp | MCTP | REGISTERED PORT |
| Port 1100 | udp | mctp | MCTP | REGISTERED PORT |
UnOfficial
Unofficialy or sometimes with conflict, the same port may be used by different applications.
| Port | Protocol (TCP/UDP) | Description |