PYTHON PROJECT · NETWORKING
Port Checker
Test TCP connectivity to a hostname or IP address.
05 · PORT CHECKER
Check TCP connectivity
Enter a hostname or IP address and a TCP port.
HOW TO USE
How to check TCP port connectivity
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Enter a hostname or IP address.
Type the target host, such as example.com or 192.168.1.1.
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Enter the TCP port.
Type a port number between 1 and 65535, such as 443.
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Click Check Port.
Submit the form to run the connectivity check.
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Review the result.
The tool returns the resolved IP address, the port and the connection status.
TCP Port Checker FAQ
What does the port checker do?
It attempts a TCP connection to a specified host and port and reports whether the connection succeeds, along with the resolved IP address.
What is a TCP port?
A numbered endpoint, from 1 to 65535, that identifies a specific service or application running on a host.
What does an open port mean?
It means the tool was able to establish a TCP connection, indicating a service is actively listening on that port.
Can I check any host on the internet?
This tool is intended for checking hosts and ports you are authorized to test. Be mindful of the target network's policies before testing.