What are the most commonly used ports?

Hello all,

Hope this post finds you in good health and spirit.

This post is regarding ports number which are being used for windows services as well applications.

TCP is the abbreviation of “Transfer Control Protocol” whereas UDP is the abbreviation of “User Datagram Protocol”. TCP and UDP are both the main protocols which are used during the Transport layer of a TCP/IP Model.

Port Number —Description
1TCP Port Service Multiplexer (TCPMUX)
5Remote Job Entry (RJE)
7ECHO
18Message Send Protocol (MSP)
20 FTP– Data
21FTP — Control
22SSH Remote Login Protocol
23Telnet
25Simple Mail Transfer Protocol (SMTP)
29MSG ICP
123Time service
42Host Name Server (Nameserv)
43WhoIs
49Login Host Protocol (Login)
53Domain Name System (DNS)
67/68DHCP Server
70Gopher Services
79Finger
80HTTP
103X.400 Standard
108SNA Gateway Access Server
109POP2
110POP3
115Simple File Transfer Protocol (SFTP)
118SQL Services
119Newsgroup (NNTP)
137NetBIOS Name Service
139NetBIOS Datagram Service
143Interim Mail Access Protocol (IMAP)
150NetBIOS Session Service
156SQL Server
161SNMP
179Border Gateway Protocol (BGP)
190Gateway Access Control Protocol (GACP)
194Internet Relay Chat (IRC)
197Directory Location Service (DLS)
389Lightweight Directory Access Protocol (LDAP)
396Novell Netware over IP
443HTTPS
444Simple Network Paging Protocol (SNPP)
445Microsoft-DS/SMB
458Apple QuickTime
88Kerberos
3268/3269GC
563SNEWS
569MSN
1080Socks
  • Well-known ports range from 0 through 1023.
  • Registered ports are 1024 to 49151.
  • Dynamic ports (also called private ports) are 49152 to 65535.

For further information, see RFC 1700.

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