Per Hedbor () @ Pike (-) developers forum wrote:
Browsers are supposed to cache dns<->ip util they are restarted.
http://christ1an.blogspot.com/2007/07/dns-pinning-explained.html
Until the window gets closed, I seem to distill from it, interesting article.
That would mean that inside an ongoing session or as long as you have related sessions, it should reuse the IP-address.