You can register your domain up to 10 years; however, not all top-level domains (TLDs) allow this many years of registration. There are two ways to see how many years of registration are allowed on a certain TLD:

1. Go to the individual TLD page and scroll down to the "Domain Pricing" table. Here you will see prices listed for each year of registration that is available for that TLD. For example, on the .AT page, you will notice that only the first year's price is listed, while on the .COM page, all 10 years have prices. This is because .AT can only be registered for a maximum of one year, while .COM can be registered up to the maximum of 10 years.
2. Add the domain name you are interested in registering to the shopping cart and click on the "1 year" drop-down. When you add a domain to your cart, the default selection is 1 year. You can use this drop down to adjust the number of years you would like to register your domain. The drop-down will list the highest number of years that are available for registration for your chosen domain.

Registering your domain for multiple years can help ensure that you don't lose your domain to expiration.