Port Checker

Check if a specific port is open on any host or IP address

Enter a domain name or IP address to check

Port range: 1-65535 (common ports: 80=HTTP, 443=HTTPS, 22=SSH, 3306=MySQL)

Port Check Results

Bulk Port Checker

Check multiple ports at once by uploading a CSV file or entering data manually

Enter one host:port pair per line (e.g., google.com:80)

Bulk Port Check Results

Port Checker Help

Quickly test if a specific port is open or closed on any IP address or hostname. Perfect for developers, network administrators, and security testers who need to verify server configurations, check firewall rules, or troubleshoot connectivity issues.

Quick Start

  1. Enter the hostname or IP address you want to test (e.g., example.com or 192.168.1.1)
  2. Enter the port number you want to check (1-65535)
  3. Click "Check Port" to run the test
  4. View the results showing whether the port is open or closed

Common Port Numbers

22: SSH (Secure Shell)
25: SMTP (Email)
53: DNS
80: HTTP (Web)
110: POP3 (Email)
143: IMAP (Email)
443: HTTPS (Secure Web)
3306: MySQL
3389: RDP (Remote Desktop)
5432: PostgreSQL
6379: Redis
8080: HTTP Alternate

Understanding Results

  • Port Open: The port is accessible and accepting connections
  • Port Closed: Either the port is not listening, or a firewall is blocking access
  • Timeout: No response received, usually indicates firewall filtering

Frequently Asked Questions

Q: What does "port closed" mean?

A: A closed port means either the port is not listening for connections, or a firewall is blocking access. This could be expected behavior if the service isn't running, or it might indicate a configuration issue.

Q: Can I check ports on internal IP addresses?

A: Yes, you can check any accessible IP address. However, results depend on your server's network access. Private IPs (192.168.x.x, 10.x.x.x) will only work if the target is on the same network.

Q: How many ports can I check per day?

A: Free users can check 100 ports per day. Basic users get 1,000 checks, Gold users get 5,000, and Ultimate users have unlimited checks.

Bulk Port Checking

For checking multiple hosts and ports at once:

  1. Download the CSV template from the Bulk Tool tab
  2. Fill in your target hosts and port numbers
  3. Upload the completed CSV file
  4. Click "Check Ports" to run all checks
  5. View results in a table format

⚠️ Security Note

Port scanning without permission may violate terms of service or local laws. Only check ports on systems you own or have explicit permission to test.

💡 Tip

A closed port on a database server (like MySQL on port 3306) is often good for security - it means the database isn't publicly accessible!

Usage Limits

Plan Daily Limit Best For
Free (Current) 100 uses/day Personal use
Basic 1000 uses/day Regular use
Gold 10000 uses/day Power users
Ultimate Unlimited Unlimited access