WikiMedia Bug 2856 as I use Internode and they use at least two (12) transparent proxies(Contributions:206.26.206.130 and Contributions:206.26.206.129). Also WikiMedia Bug 550 which addresses similar problems.
I was impressed by the list formerly on Adam Carr's user page. In order to compete I've included countries visited as a child and defined visit as including transit stops (got off the plane). I've listed and sized them in order of the duration. By the end of the list it's pretty tenuous. I've used historical flags where appropriate. If I knew how I'd make it like a jigsaw.