Port 42 Host Name Server - System Port

Port 42 is a System Port. Transport Protocol TCP UDP , Port 42 Service Name name, Service Name Description: Host Name Server.

Port	Protocol	Service Name	Description	Source
42	TCP UDP	name	Host Name Server	IANA
42	TCP UDP	nameserver	Host Name Server	IANA
42	TCP UDP		ARPA Host Name Server Protocol,Official	wikipedia
42	TCP UDP		Windows Internet Name Service,Unofficial	wikipedia
42	TCP		W32.Dasher	bekkoame
42	TCP UDP	name	Host Name Server	bekkoame
42	TCP UDP	nameserver	Host Name Server	bekkoame

Port	Service Name	Description
7	echo	Echo
2399	fmpro-fdal	FileMaker, Inc. - Data Access Layer
2910	tdaccess	TDAccess
3486	ifsf-hb-port	IFSF Heartbeat Port
4895		Unassigned
4912	lutap	Technicolor LUT Access Protocol
5168	scte30	SCTE30 Connection
5175		Unassigned
5404	hpoms-dps-lstn	HPOMS-DPS-LSTN
5411	actnet	ActNet

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