There is something wrong. The site is being hosted by UUNET/MCI or whoever they are these days.
In this environment I would imagine his site is sitting on a shared server so should respond to a ping request - nada. The response from a WHOIS on the domain comes back with the error message "there is no match ofr jackpcs.com. But the DNS does resolve to that address.
I will try sending an email to the tech support contact listed on the IP Block owner and see if they will let me know whats up.