Port Checker
Check whether a TCP port is open from your web server.
Open Port Checker
Examples:
How to use
- Enter a hostname or IP address followed by a port.
- Click Check Port.
- Review whether the TCP port is open or closed.
Frequently Asked Questions
What does an open port mean?
An open port means a service is accepting TCP connections on that host and port.
Can I check SMTP port 25?
Yes. You can test ports such as 25, 465, 587, 993, 995, 80 and 443.
