ICQ Status Checker is a web based tool. You can use it to see your friend is Online or Offline on ICQ Messenger. ICQ Block Checker is the same tool, some people call it with different names, and some with different. It actually show the status of a person, if that person is online according to ICQ Status Checker and offline in your ICQ Messenger, that means he/she has blocked you. This tool may be known as ICQ Block Checker, ICQ Status Checker, ICQ Messenger Block Checker, ICQ Status Viewer and ICQ Status Finder in search engines.