Sudokuonline.cz is tracked by us since April, 2011. Over the time it has been ranked as high as 303 599 in the world, while most of its traffic comes from Germany, where it reached as high as 32 564 position. It was owned by several entities, from Marek Čierny nsset: SUBREG-20081220073658 to Marek Čierny of Marek Čierny, it was hosted by Gransy s.r.o., Gransy s.r.o. and others. While REG-GRANSY was its first registrar, now it is moved to CZ-NIC.

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