Port 139

Modified by:

Port 139 is known as NetBIOS Session Service. It is used for file and printer sharing over a network using the Server Message Block (SMB) protocol. This port is commonly used by Windows operating systems for network communication. However, it can also be used by malware to spread and infect other computers on the network.

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 139
tcp
netbios-ssn
NETBIOS Session Service
WELL KNOWN PORT
Port 139
udp
netbios-ssn
NETBIOS Session Service
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 366
Ports those registered with IANA are shown as official ports. The same port number
Port 4390
Ports those registered with IANA are shown as official ports. The same port number
Port 2226
Port 2226 is typically used by DirectAdmin, a web hosting control panel software, for
Port 4434
Port 4434 is not assigned to any specific service or protocol by the Internet
Port 1335
Ports those registered with IANA are shown as official ports. The same port number
Port 23003
Ports those registered with IANA are shown as official ports. The same port number
Port 2107
Port 2107 is not a specific port for any standard protocol or service. It
Port 1648
Ports those registered with IANA are shown as official ports. The same port number
Port 31416
Ports those registered with IANA are shown as official ports. The same port number
Port 1274
Ports those registered with IANA are shown as official ports. The same port number
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