Port 3

Modified by:

I’m sorry, but I do not have enough information to answer this question. Port 3 could be referring to a specific port on a piece of hardware, such as a computer or router, and its use would depend on the device and its configuration. Without more context, it is impossible to determine what Port 3 is used for.

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 3
tcp
compressnet
Compression Process
WELL KNOWN PORT
Port 3
udp
compressnet
Compression Process
WELL KNOWN PORT

UnOfficial

Unofficialy or sometimes with conflict, the same port may be used by different applications.

Port Protocol (TCP/UDP) Description
TCP UDP Ports
Other ports
Port 4023
Ports those registered with IANA are shown as official ports. The same port number
Port 399
Ports those registered with IANA are shown as official ports. The same port number
Port 2953
Ports those registered with IANA are shown as official ports. The same port number
Port 1223
Port 1223 is typically used by a variety of applications and protocols for communication
Port 208
Ports those registered with IANA are shown as official ports. The same port number
Port 17235
Ports those registered with IANA are shown as official ports. The same port number
Port 8291
Port 8291 is commonly used for accessing the user interface of MikroTik routers and
Port 46
Ports those registered with IANA are shown as official ports. The same port number
Port 389
Port 389 is used for Lightweight Directory Access Protocol (LDAP) which is a protocol
Port 10809
Port 10809 is often used for the “Object-oriented File Transfer and Remote Access Protocol”
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