Try going to www.downforeveryoneorjustme.com and type in your website address.
If it is just you, it could be that your IP is blocked for security reasons. Please email us at team@echo3.com.au with your IP address and we can unblock this for you (to get your IP address, just type "what's my ip?" in your browser and you should see a string of numbers e.g. 110.175.69.155)
If it is down for everyone, email us at team@echo3.com.au and we will get the techies to look at it straight away.
There are several reasons why your IP might be blocked - here is an article that explains it in more detail: www.clickhost.com/why-is-my-ip-blocked/