List Of Common Network Port Numbers

List Of Common Network Port Numbers

Before you start:

Objectives: Learn common services and port numbers and which transport protocol they make use of.

Prerequisites: You need to know about the TCP/IP protocols in general.

Key Terms: Network, port numbers, protocol, common, and services.

The network ports are actually given by the UDP or TCP protocols at the Transport layer. They’re utilized by the protocols in the OSI model’s upper layers. Eth port numbers are utilized for determining what protocol incoming traffic ought to be directed to.

Ports permit a single host with a single IP address for running the network services. Every port number recognizes a distinct service, and every host can, in fact, have 65535 ports for each IP address. Port use is actually regulated by the ICANN (Internet Corporation for Assigning Names and Numbers). By ICANN, there are actually three categories for the ports:

  • From 0-1023: Renowned ports allocated to common services and protocols.
  • From 1024-49151: Registered ports allocated by ICANN to a particular service.
  • From 49152-65 535: The dynamic (high, private) ports range from 49,152-65,535. It can be utilized by any service on an ad-hoc basis. Ports are allocated when the session is set up and launched when the session ends.

Common Network Port Numbers: 

Well, known ones are:

PortService nameTransport protocol
20, 21File Transfer Protocol (FTP)TCP
22Secure Shell (SSH)TCP and UDP
25Simple Mail Transfer Protocol (SMTP)TCP
50, 51IPSec
53Domain Name System (DNS)TCP and UDP
67, 68Dynamic Host Configuration Protocol (DHCP)UDP
69Trivial File Transfer Protocol (TFTP)UDP
80HyperText Transfer Protocol (HTTP)TCP
110Post Office Protocol (POP3)TCP
119Network News Transport Protocol (NNTP)TCP
123Network Time Protocol (NTP)UDP
135-139NetBIOSTCP and UDP
143Internet Message Access Protocol (IMAP4)TCP and UDP
161, 162Simple Network Management Protocol (SNMP)TCP and UDP
389Lightweight Directory Access ProtocolTCP and UDP
443HTTP with Secure Sockets Layer (SSL)TCP and UDP
989, 990FTP over SSL/TLS (implicit mode)TCP
3389Remote Desktop ProtocolTCP and UDP


Similar Posts