Check whether a port is reachable

Find out if you can connect to a server on a given port, like a database or a website.

Fill these in once

Server name or IPPort number

Try to connect
Terminal
```
nc -vz example.com 443
```
"succeeded" means the port is open. "Connection refused" or a timeout means it isn't reachable.

Try to connect
Terminal · Ubuntu / Debian
```
nc -vz example.com 443
```
"succeeded" means the port is open. "Connection refused" or a timeout means it isn't reachable.

Try to connect
PowerShell
```
Test-NetConnection example.com -Port 443
```
TcpTestSucceeded True means the port is open.