We have three different regions you can be logged into - Sydney, Dublin or Los Angeles. When you login to app.zencontract.com, the system will redirect you to the correct region.
When you setup your account, you select the region closest to you. You are able to login to any of the other regions, and the system will redirect you back to your home region.
We operate the different regions so that it's close to your location (for speed) plus we are able to maintenance after hours, and not affect the other regions who might be still in business hours.