Ever wondered if that essential port is actually open on your server? Is your website accessible... or is there a firewall blocking connections?

With our Port Checker tool, you'll finally get clear answers. It's the port scanning tool you've been looking for — simple yet powerful. Enter a host and port number and get instant results.

It's fast. It's free. It works. Let's go.

Wait, What's a Port Anyway?

Think of ports like different doors to your server or computer. Each door (port) lets specific types of traffic in and out — web traffic, email, FTP, and more.

Common ports include:

  • Port 80 – HTTP (standard web traffic)
  • Port 443 – HTTPS (secure web traffic)
  • Port 22 – SSH (secure remote access)
  • Port 21 – FTP (file transfers)

Every service running on your server uses specific ports to communicate with the outside world.

What Does This Magical Port Checker Do?

You enter a host (domain or IP) and a port number. We check if that port is accepting connections. It's like knocking on a door to see if anyone answers:

  • 🔓 Open ports – The door is unlocked and accepting connections
  • 🔒 Closed ports – The door is locked or nobody's answering
  • 🧱 Filtered ports – Something (likely a firewall) is blocking our knock
  • ⏱️ Response time – How quickly the port responds

This simple check can help diagnose numerous connectivity and security issues.

Why Would You Use This?

  1. Troubleshooting server issues
    Is your website down? Maybe port 80 or 443 is closed. Can't connect via SSH? Check if port 22 is open.
  2. Security auditing
    Find out which ports are open on your server that shouldn't be. Open ports can be security vulnerabilities.
  3. Verifying firewall configurations
    After setting up firewall rules, verify that only the necessary ports are accessible.
  4. Checking remote services
    Need to know if a database, email server, or other service is reachable? Check its port status.

Is the Check Always Accurate?

Let's be real — the tool is smart, but network complexity can affect results:

  • Firewalls may block our checking requests
  • Some networks use port forwarding
  • Cloud providers might have additional security layers
  • NAT (Network Address Translation) can complicate results

So… it's highly reliable, but network complexities exist.

What Makes Our Port Checker Better?

  • ✅ No ads shouting at you
  • ✅ Works on desktop, tablet, phone
  • ✅ Loads faster than your coffee machine
  • ✅ No login, no limits, no drama
  • ✅ Clear, easy-to-understand results
  • ✅ Completely free (because who wants to pay for basic checks?)

It's not just fast and free. It's a smart port scanner without the complexity — no sign-up, no BS, no ads screaming in your face.

Common Port Numbers and What They Do

Understanding common ports helps with network troubleshooting:

  • 21 - FTP (File Transfer Protocol)
  • 22 - SSH (Secure Shell)
  • 25 - SMTP (Email sending)
  • 53 - DNS (Domain Name System)
  • 80 - HTTP (Web traffic)
  • 110 - POP3 (Email receiving)
  • 143 - IMAP (Email synchronization)
  • 443 - HTTPS (Secure web traffic)
  • 3306 - MySQL (Database)
  • 3389 - RDP (Remote Desktop)

Bonus: Network Security Tips

  • Only open ports that are absolutely necessary
  • Use firewalls to restrict access to sensitive ports
  • Regularly audit your open ports
  • Consider using non-standard port numbers for common services
  • Implement rate limiting to prevent brute force attacks