The first time I got told that my site was down by one of my clients, I didn't bother to check because it's easily something wrong with his / her own internet connection. But after another 2 clients informed me of my site down time, I'm starting to sweat. However, the weird thing is, I checked my site from several different proxies in United States and it seems perfectly fine. All of the 3 clients are in United States. I sent a reply to the last one asking which state and ISP he is using but he hasn't got back to me yet. So is it possible that my server at knownhost was intermittently inaccessible from some specific regions / states / cities / IP ranges of US?