21robot.org is tracked by us since December, 2013. Over the time it has been ranked as high as 1 082 699 in the world, while most of its traffic comes from Japan, where it reached as high as 57 215 position. All this time it was owned by Noriko Arai of National Institute of Informatics, it was hosted by National Institute of Informatics and GitHub INC..

21robot has a high Google pagerank and bad results in terms of Yandex topical citation index. We found that 21robot.org is poorly ‘socialized’ in respect to any social network. According to Google safe browsing analytics, 21robot.org is quite a safe domain with no visitor reviews.