1. First, make sure your account is not suspended or terminated. Check your mailbox if you have received a suspended or termination email from your host.
  2. Check to find out whether the site is down for everyone, or just for you. Visit http://downforeveryoneorjustme.com/, plug in your domain name, and click on “just me.” If it’s just you, you’ve got some kind of DNS or connection problem. Contact your ISP.
  3. If your host has a page that list server status, check it. e.g. http://serverstatus.xxxhost.com . If your server box is listed there as offline, most probably their support has aware of the problem, usually you do not have to report it and it will fix by them.
  4. Try to get into your control panel. If you are using CPanel, you will see a server status link and you will be able to see what’s went wrong.
  5. Ping your domain, and also do a tracert from your PC to your domain. If there’s a faulty node somewhere between your location and your server, there is nothing your host can do about it. You can either wait for the problem to be resolved, or contact your ISP for assistance.
  6. If you gone through all the steps above and can’t resolve it, contact your host for support, either email, telephone or online chat.

    While most hosting company offer 99.9% network uptime but they usually do not offer 99.9% server up-time.   Good luck ~