I21st.cn is tracked by us since April, 2011. Over the time it has been ranked as high as 40 949 in the world, while most of its traffic comes from China, where it reached as high as 5 114 position. It was owned by several entities, from 王汝建 英文二十一世纪(北京)教育传媒发展中心 to 中报国际文化传媒（北京）有限公司, it was hosted by BJ SIDC of CNC, China Mobile Communications Corporation and others.

I21st has a high Google pagerank and bad results in terms of Yandex topical citation index. We found that I21st.cn is poorly ‘socialized’ in respect to any social network. According to MyWot and Google safe browsing analytics, I21st.cn is quite a safe domain with no visitor reviews.