 <p>If you have a large pool of proxies you can use, then I suppose you could switch between them, but otherwise no, you generally can't just renew your IP address whenever you feel like it.</p> <p>You might want to look into <a href="http://www.torproject.org/" rel="nofollow noreferrer">Tor</a>, an anonymizing network which does something like what you're asking about.</p>