Looks like it's real, seems to belong to a large - and old, that's probably why it's so low - US ISP. It dropped ping-packets, but then again, most firewalls are set to do that.
Getting a fake IP to show up there would be rather difficult AFAIK, or at least rather pointless, because if you spoof the sender address... you are not going to get the reply packets back, and thus can't actually view anything.
I've seen low digit addresses before, 4.xxx.xxx.xxx is a range that shows up occasionally. But I've never, ever seen one made of consecutive numbers like that, much less one that would have also been in the low tens.
I suppose my life is now complete; I've seen a Royal Flush in internet poker, and I've seen
that.
No, wait. Scratch that. I want one of those. I really,
really want an IP address like that. That's like... surfing with gods, d00d.
