We have dedicated server for H-Sphere CP. Websites runs off various web servers. If you are a reseller, there is possiblity that your customer accounts may be on different servers.
To add to what Atul said, we infact have a dedicated Hsphere database server + a dedicated Hsphere control panel server (web/GUI), just to serve the control panel function.
Btw, Unix1 on jodopulse.com is CP's web.