How to clear IP history from a search engine
Clearing the IP history from a search engine is extremely simple using tools built into all browsers. The history associated with a particular IP (Internet Protocol) address will also be cleared. Each Internet connection has its own unique IP address that is used to identify that user.
Clearing that address from the search engine's history removes any trace of that user.
Open your browser. This method works on Internet Explorer, Google Chrome, Firefox, Safari, Opera, Netscape and many other browsers. Open the "Options" or "Tools" menu. Select "Clear Browsing History" or "Clear Private Data."
Select what traces of browsing history are to be cleared. Most browsers have some variation of the following options: "Browsing & Download History," "Form & Search History," "Cookies," "Cache," "Active Logins," "Site Preferences" and "Passwords." Make sure "Form & Search History" are cleared, as this is what will impact search engine history. Select the "Duration." This will determine how far back the deletion process should go. Typically the user can select from one hour to a month, or "everything." To ensure all history is deleted, select "everything." Click "OK."
Wait for the browser to delete the history from the search engine. This process can take seconds or minutes, depending on the amount of information that needs to be cleared.
Take preventive measures. Block all search engines from seeing the computer's IP by browsing with a "proxy." Proxy browsing connects the computer to a third-party IP and then browses the Internet, so sites and search engines see the third-party IP.