Just enter an "@hotmail.com" or "@msn.com" address, and press the "check" button to find out if the person is online or not. If this person shows up as online, but they're offline on your buddylist then they have BLOCKED you!
NOTE: Status will appear in a pop up.
My ICQ Online Status Checker
My ICQ Online Status Checker
On this page you can checkout if an icq-user is online, even without icq installed on your own PC!