Leave your feedback Share Copy URL https://www.pbs.org/newshour/show/4-1-2-billion-ip-addresses-just-how-big-is-that Email Facebook Twitter LinkedIn Pinterest Tumblr Share on Facebook Share on Twitter Story Hari Sreenivasan turns to one of the Internet’s orginal architect’s, Vint Cerf with questions on the latest move to handle a fast-growing Internet. Hari asks, did you ever think we’d run out of 4 1/2 billion addresses?