Commonly Used TCP Ports with Port Finder Tool

Find Port Number Tool


Use this tool to find specific TCP/UDP port numbers assigned to various services or programs. This tool searches for both well known ports and registered port numbers. The official list is available in IAEA website

Port Number


Port Usage Description

(port number or service or any description)

Note: if you cannot find particular port number, then the port is either reserved or not assigned.

Disclaimer: We cannot guarantee that this tool can give you true or accurate results. We accept no responsibility for any loss or damage related to the use of this tool. Use of this tool is at your own risk.

A port is a communication point where one or more computers in a network communicate with each other through a program or software. There are about 0-65535 ports assigned to do specific tasks in a PC. Most ports operate with TCP or UDP protocol.

Difference TCP vs UDP Protocols
How to Investigate a Suspicious Port in Windows XP & Linux
Port Number Finder Tool

Port numbers are assigned by an organisation called IANA and ports are allocated to various needs to avoid confusion.

Ports are classified into 3 main categories..

Well Known Ports
Well known ports are used by system or processes run by root or with specific previleges. The port numbers range from 0 to 1023.

Registered Ports
The registered port numbers range from 1024-49151. Such ports are used by programs run by users in the system.

Private/Dynamic Ports
Private ports are not assigned for any specific purpose. its range are from range 49152–65535

Difference TCP vs UDP Protocol

TCP/IP Protocol
UDP Protocol
It is a connection oriented protocol It is connectionless protocol which means it can send packets without establishing connection with the receiver at first.
It has flow control and error correction It is error prone during transmission.
It is not fast and primarily used for data transmission like (http,ssh,smtp,ftp, mail etc.)

It is fast and used mostly for audio and video streaming.

Most common services requiring confirmation of delivery like http,ssh,smtp,ftp, mail etc. use TCP ports

UDP ports are commonly used by services or programs that dont require the confirmation of delivery of packets. Most commonly used is DNS queries using UDP port 53.

Port Numbers in URLs

Port numbers can also be specified using URL. For example port 80 is by default for HTTP. when you type a dot com in your browser the browser sends request in the form of to the server which responds and transfers data. Similarly port numbers can be specified in URL format as specified below depending on the application running with apache.

Example: (Secure HTTP with SSL)

Note that the ports are specified with colon (:) in front.

Commonly Used Port Numbers

The following port numbers are unofficial list of commonly used for linux/unix based servers.

Port Number Protocol
21 TCP FTP (File Transfer Protocol)
22 TCP/UDP SSH (ssh,scp copy or sftp)
23 TCP/UDP Telnet
25 TCP/UDP SMTP (for sending outgoing emails)
43 TCP WHOIS function
53 TCP/UDP DNS Server (Domain name service for DNS requests)


DHCP Server
DHCP Client
70 TCP Gopher Protocol
79 TCP Finger protocol
110 TCP POP3 (for receiving email)
119 TCP NNTP (Network News Transfer Protocol)
143 TCP/UDP IMAP4 Protocol (for email service)
389 TCP/UDP LDAP (light weight directory access)
443 TCP Secure HTTP over SSL (https)
465 TCP Secure SMTP (email) using SSL
990 TCP/UDP Secure FTP using SSL
993 TCP Secure IMAP protocol over SSL (for emails)
1433 TCP/UDP Microsoft SQL server port
2082 TCP Cpanel default port
2083 TCP Cpanel over SSL
2086 TCP Cpanel Webhost Manager (default)
2087 TCP Cpanel Webhost Manager (with https)
2095 TCP Cpanel Webmail
2096 TCP Cpanel secure webmail over SSL
2222 TCP DirectAdmin Server Control Panel
3306 TCP/UDP MySQL Database Server
4643 TCP Virtuosso Power Panel
5432 TCP PostgreSQL Database Server
8080 TCP HTTP port (alternative one for port 80)
8087 TCP Plesk Control Panel Port (default)
8443 TCP Plesk Server Control Panel over SSL
9999 TCP Urchin Web Analytics
10000 TCP Webmin Server Control Panel
19638 TCP Ensim Server Control Panel

More unofficial list of ports and assignments s available here
Official ports and its assignments are published at the IANA website.

Note: The above published ones are unofficial list compiled from various sources.

References and Useful Links

Official port numbers and assignments from IANA -
TCP and UDP Ports from Wikipedia -
Trojan Port List -

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