If you are unable to access our website, there are three likely reasons:
Our website is intentionally down for maintenance and upgrades, in which case you'll see a message about this when you try to visit.
Our website is unintentionally down, in which you case you may not see any kind of message when you try to visit (this happens very rarely, though).
Our website is up, but you are unable to reach it for some reason (this is more common and can happen for a variety of reasons).
To see if our site is actually down, you can use a service called Down for Everyone or Just Me. You can also check the current and historical status of our website from our status and uptime report.
In any case, if you're having trouble reaching our website, let us know and we'll help you figure it out. To expedite the troubleshooting, it would be helpful for you to visit Down for Everyone or Just Me first and let us know what it says!