Online TCP Port Scanner

Welcome to Our Online TCP Port Scanner

Our TCP port scanning tool is a free resource that allows you to explore the 1000 most commonly used ports on a remote machine. Whether you want to scan well-known ports or specify a particular port, our service provides the necessary flexibility.

How Does Port Scanning Work?

Port scanning involves sending TCP requests to a remote machine. Each port corresponds to a specific service on the machine. For example, port 80 is associated with the HTTP protocol, port 443 with HTTPS, port 22 with SSH, and so on.

By sending requests to specific ports, our scanner receives responses indicating whether the port is open, closed, or filtered. An open port means it is ready to receive requests, while a closed port is not in use. A filtered port indicates that requests are ignored or blocked, often by a firewall.

Why Scan Ports?

Port scanning provides visibility into the network configuration of a machine. This helps diagnose potential issues and enhance security. For security professionals, discovering open ports is essential for detecting vulnerabilities and strengthening security posture. For an attacker, port scanning allows analysis of listening ports on the distant machine, enabling them to check for potential exploits to penetrate the remote machine.

List of Commonly Used Ports

• • 20 - FTP (File Transfer Protocol)
  File Transfer Protocol (FTP) is used for transferring files between a server and a client.
• • 21 - FTP (File Transfer Protocol)
  File Transfer Protocol (FTP) is used for transferring files between a server and a client.
• • 22 - SSH (Secure Shell)
  Secure Shell (SSH) provides secure remote access to a machine over a network.
• • 23 - Telnet
  Telnet is a protocol for text communication on a network, often used for remote command-line access.
• • 25 - SMTP (Simple Mail Transfer Protocol)
  Simple Mail Transfer Protocol (SMTP) is used for sending email messages between servers.
• • 53 - DNS (Domain Name System)
  Domain Name System (DNS) resolves hostnames to IP addresses on the internet.
• • 80 - HTTP (Hypertext Transfer Protocol)
  Hypertext Transfer Protocol (HTTP) is used for transferring web pages on the World Wide Web.
• • 110 - POP3 (Post Office Protocol 3)
  Post Office Protocol 3 (POP3) is used for retrieving email messages from a mail server.
• • 143 - IMAP (Internet Message Access Protocol)
  Internet Message Access Protocol (IMAP) is used for accessing and managing email messages on a mail server.
• • 443 - HTTPS (Hypertext Transfer Protocol Secure)
  Hypertext Transfer Protocol Secure (HTTPS) is a secure version of HTTP, used for secure communication over the internet.
• • 465 - SMTPS (SMTP Secure)
  SMTP Secure (SMTPS) is a secure version of SMTP, used for secure email communication.
• • 587 - Submission (Message Submission Agent)
  Submission is used for submitting email messages to a mail server.
• • 993 - IMAPS (Internet Message Access Protocol over TLS/SSL)
  IMAPS is a secure version of IMAP, used for secure email access.
• • 995 - POP3S (Post Office Protocol 3 over TLS/SSL)
  POP3S is a secure version of POP3, used for secure email retrieval.
• • 1433 - Microsoft SQL Server Database
  Microsoft SQL Server is a relational database management system.
• • 1521 - Oracle Database
  Oracle Database is a relational database management system.
• • 3306 - MySQL Database Service
  MySQL is an open-source relational database management system.
• • 3074 - Xbox Live
  Xbox Live is an online gaming service for the Xbox console.
• • 5000 - UPnP (Universal Plug and Play)
  Universal Plug and Play (UPnP) is a protocol for automatic discovery of devices on a network.
• • 5432 - PostgreSQL Database Service
  PostgreSQL is an open-source relational database management system.
• • 5900 - VNC (Virtual Network Computing)
  Virtual Network Computing (VNC) is used for remote desktop sharing.
• • 5984 - CouchDB (Apache CouchDB)
  CouchDB is a NoSQL database system.
• • 6379 - Redis Database Service
  Redis is an in-memory data structure store used as a database, cache, and message broker.
• • 8080 - HTTP Alternate (HTTP Proxy)
  An alternate port for HTTP, often used for proxy services.
• • 8443 - HTTPS Alternate (HTTPS Proxy)
  An alternate port for HTTPS, often used for proxy services.
• • 8888 - HTTP Alternate (HTTP Proxy)
  An alternate port for HTTP, often used for proxy services.
• • 9418 - Git
  Git is a distributed version control system for tracking changes in source code during software development.
• • 27017 - MongoDB Database Service
  MongoDB is a NoSQL document-oriented database system.

Responsible Tool Usage

We emphasize that this tool is intended for educational and security testing purposes only. It should only be used on systems for which you have authorization to perform tests. Any misuse of this tool is strictly prohibited, and we disclaim any responsibility for fraudulent use.