1133 Data Flow Network - User Port

1133 is a User Port. Transport Protocol TCP UDP , 1133 Service Name dfn, Service Name Description: Data Flow Network.

Port	Protocol	Service Name	Description	Source
1133	TCP UDP	dfn	Data Flow Network	IANA
1133			SweetHeart	simovits.com
1133	TCP UDP	dfn	Data Flow Network	bekkoame

Port	Service Name	Description
1758	tftp-mcast	tftp-mcast
4204	vrml-multi-use	VRML Multi User Systems
6085	konspire2b	konspire2b p2p network
6860		Unassigned
7138		Unassigned
7741	scriptview	ScriptView Network
8736		Unassigned
9142		Unassigned
10739		Unassigned
10791		Unassigned

A port is an endpoint of communication in an operating system. While the term is also used for hardware devices, in software it is a logical construct that identifies a specific process or a type of service.

Port numbers are assigned in various ways, based on three ranges: System Ports (0-1023), User Ports (1024-49151), and the Dynamic and/or Private Ports (49152-65535);

The Well Known Ports are assigned by the IANA and on most systems can only be used by system (or root) processes or by programs executed by privileged users. Ports are used in the TCP [RFC793] to name the ends of logical connections which carry long term conversations. For the purpose of providing services to unknown callers, a service contact port is defined. This list specifies the port used by the server process as its contact port. The contact port is sometimes called the "well-known port". To the extent possible, these same port assignments are used with the UDP [RFC768]. The range for well-known ports managed by the IANA is 0-1023.
DYNAMIC AND/OR PRIVATE PORTS Registered Ports are those from 1024 through 49151.
The Dynamic and/or Private Ports are those from 49152 through 65535