TCP/UDP Ports List - Port 273 (TCP/UDP)

Port 273 Unassigned

Port 273 is a System Port. Transport Protocol , Port 273 Service Name , Service Name Description: Unassigned.

Port	Protocol	Service Name	Description	Source
273			Unassigned	IANA

Port	Service Name	Description
1929	bandwiz-system	Bandwiz System - Server
2310	sdclient	SD Client
2703	sms-chat	SMS CHAT
3296	rib-slm	Rib License Manager
3302	mcs-fastmail	MCS Fastmail
3786	upstriggervsw	VSW Upstrigger port
4613		Unassigned
5587		Unassigned
5924		Unassigned
6669	ircu	IRCU

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