1187 Alias Service - User Port | Service Name:alias

1187 is a User Port. Transport Protocol TCP UDP , 1187 Service Name alias, Service Name Description: Alias Service.

Port	Protocol	Service Name	Description	Source
1187	TCP UDP	alias	Alias Service	IANA
1187	TCP UDP	alias	Alias Service	bekkoame

Port	Service Name	Description
531	conference	chat
669	meregister	MeRegister
755		Unassigned
911	xact-backup	xact-backup
1047	neod1	Sun's NEO Object Request Broker
1717	fj-hdnet	fj-hdnet
2209	rimf-ps	HP RIM for Files Portal Service
2733	signet-ctf	Signet CTF
3096	ndl-aps	Active Print Server Port
3851	spectraport	SpectraTalk Port

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