Cstl.org is tracked by us since December, 2016. Over the time it has been ranked as high as 626 699 in the world, while most of its traffic comes from USA, where it reached as high as 116 917 position. It was owned by several entities, from Ray Ann Havasy of Center for Science Teaching and Learning to REDACTED FOR PRIVACY of REDACTED FOR PRIVACY, it was hosted by SoftwareWorks Group Inc., CloudFlare Inc. and others.

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