I just tried calling that number, I got an automated response from "<something... beginning with a?> Solutions" with a pretty generic "press 1 for sales", "press 2 for customer care"-type set of options. That was a bit disappointing, I really hope he's okay...
It was presumably the hosting company (listed in the WHOIS records as "Layered Technologies"). I wouldn't expect them to provide you with any information about him.
I'm pretty sure it wasn't them, it definitely ended with "Solutions". The first word sounded something like "all-doors" but I couldn't really make it out (I'm not familiar with the accent).