My site used to have a Global and/or Country Rank. Where did it go?

As mentioned in the Why is my site’s Traffic Rank “No data” or “No rank”? FAQ, our Global traffic ranks are based on the past three months of traffic. Our Country traffic ranks are based on the past month of traffic. If we do not have enough data for your site over the past 3 months your Global rank will disappear. If we do not have enough data for your site over the past month your Country rank will disappear. Once we have enough data for your site you will see the ranks again.