What is my IP - IP address checking utility

What is my IP

Current version: 1.0.1-a
Last update: 2011-08-31
Download link: download [301 KB]


WhatIsMyIP is a small utility intended for home internet users, who want to know their public IP address. You need to know your public IP address in order to access your home computer via the internet from outside your home.

This application periodically contacts the www.whatismyip.com website to determine the IP address. When it detects, that the IP address has changed, it can perform a configurable action, like sending an email to someone. This is especially useful for people who are hosting a domain on their home computer.

What is my IP
What is my IP main window.

The application runs in the background and is accessible through a system tray icon. When the IP address has changed, it shows a tool tip (see picture). On top of that, the application can run any user configured program as a respons to IP change. See the manual for details on how to configure this.

A tooltip is shown when IP address has changed.
System tray icon and notification.


  • Runs on windows 2000, XP, Vista and later
  • Configurable interval between IP address checks
  • Configurable action on IP change:
    • Send an email with the new IP address
    • Hit a web page with the new address in a GET parameter
    • Run any program with the new address in a command line argument
  • Detects only IPv4 address in current version

Planned features

If I find the time, I plan to implement this program also as Windows service. The added value of this would be that the user will need not to be logged in to the system to run the application.

If you have any ideas how to improve this application or you need a specific feature, you can contact me.