Port 1026 is used by the Remote Procedure Call (RPC) service over Transmission Control Protocol (TCP) or User Datagram Protocol (UDP) for Windows Communication Foundation (WCF) callback services.
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 1026 | tcp | cap | Calendar Access Protocol | REGISTERED PORT |
| Port 1026 | udp | cap | Calendar Access Protocol | REGISTERED PORT |
UnOfficial
Unofficialy or sometimes with conflict, the same port may be used by different applications.
| Port | Protocol (TCP/UDP) | Description |
| Port 1026 | Often used by Microsoft DCOM services |