Cas.cz is tracked by us since April, 2011. Over the time it has been ranked as high as 18 549 in the world, while most of its traffic comes from Czech Republic, where it reached as high as 93 position. Umbr.cas.cz receives less than 1% of its total traffic. It was owned by several entities, from Středisko společných činností AV ČR v.v.i. admin-c: VANICEKP to Středisko společných činností AV ČR v.v.i. of Středisko společných činností AV ČR v.v.i., it was hosted by Czech Academy of Sciences. While REG-INTERNET-CZ was its first registrar, now it is moved to CZ-NIC.

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