Port used for Zoho

I am able to log into zoho creator and title a new application but that's as far as I get at work. I cannot insert fields with zoho creator or use any of the other applications (writer, spreadsheet etc.). They are frozen on the screen and the only thing I can do is sign out. I brought this to our net admin and he thought we might have some of the ports blocked that Zoho uses. I was wondering if you can let me know what ports are used for zoho, so that I may ask to have them unblocked.

Thanks
Karen
kmarshall1