TCP/UDP Port Finder

Enter port number (e.g. 21), service (e.g. ssh, ftp) or threat (e.g. nimda)
Database updated - March 30, 2016

Search results for "service"

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Port: 139/UDP
139/UDP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • netbios-ssn
    NETBIOS Session Service
    IANA
  •  
    NetBIOS NetBIOS Session Service (Official)
    WIKI
  • threat
    [threat] W32.Spybot
    Bekkoame
Port: 140/TCP
140/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • emfis-data
    EMFIS Data Service
    IANA
Port: 140/UDP
140/UDP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • emfis-data
    EMFIS Data Service
    IANA
Port: 141/TCP
141/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • emfis-cntl
    EMFIS Control Service
    IANA
Port: 141/UDP
141/UDP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • emfis-cntl
    EMFIS Control Service
    IANA
Port: 149/TCP
149/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • aed-512
    AED 512 Emulation Service
    IANA
Port: 149/UDP
149/UDP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • aed-512
    AED 512 Emulation Service
    IANA
Port: 156/TCP
156/TCP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • sqlsrv
    SQL Service
    IANA
  •  
    SQL Service (Official)
    WIKI
Port: 156/UDP
156/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • sqlsrv
    SQL Service
    IANA
  •  
    SQL Service (Official)
    WIKI
Port: 158/TCP
158/TCP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • pcmail-srv
    PCMail Server
    IANA
  •  
    DMSP, Distributed Mail Service Protocol (Unofficial)
    WIKI
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About TCP/UDP ports

TCP port 139 uses the Transmission Control Protocol. TCP is one of the main protocols in TCP/IP networks. TCP is a connection-oriented protocol, it requires handshaking to set up end-to-end communications. Only when a connection is set up user's data can be sent bi-directionally over the connection.
Attention! TCP guarantees delivery of data packets on port 139 in the same order in which they were sent. Guaranteed communication over TCP port 139 is the main difference between TCP and UDP. UDP port 139 would not have guaranteed communication as TCP.
UDP on port 139 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP on port 139 thinks that error checking and correction is not necessary or performed in the application, avoiding the overhead of such processing at the network interface level.
UDP (User Datagram Protocol) is a minimal message-oriented Transport Layer protocol (protocol is documented in IETF RFC 768).
Application examples that often use UDP: voice over IP (VoIP), streaming media and real-time multiplayer games. Many web applications use UDP, e.g. the Domain Name System (DNS), the Routing Information Protocol (RIP), the Dynamic Host Configuration Protocol (DHCP), the Simple Network Management Protocol (SNMP).
TCP vs UDP - TCP: reliable, ordered, heavyweight, streaming; UDP - unreliable, not ordered, lightweight, datagrams.
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