Find the port number of current session in PuTTY

To answer your literal question: To find an IP address and a port number of the current session:

• Right click PuTTY console window title;
• Select Event Log;

• The very first entry in the log says:

  Connecting to <ip> port <port>
  

  

Though in majority of cases the port will be 22, as that's the standard SSH port.

After spending some time with putty, I figured out myself.

In putty configuration, click name in the Saved Sessions, then click Load button, one can see the port number in the above Port field.

Open Putty -> select Session -> Load -> See the Port Field

Sometimes, simple things just doesn't get easily caught with our eyes.