You will often see the 1e100.net in reverse domain lookups, such as those produced by traceroute and ping. Try a traceroute to google.com and you should see at

You will often see the 1e100.net in reverse domain lookups, such as those produced by traceroute and ping. Try a traceroute to google.com and you should see at least one if not several 1e100.net hops.