Sigma.ir is tracked by us since April, 2011. Over the time it has been ranked as high as 135 439 in the world, while most of its traffic comes from Iran, where it reached as high as 3 419 position. It was owned by several entities, from Sigma ITID Company to Sigma Information Technology Infrastructures Development Co, it was hosted by "Pirooz Leen" LLC, ADSL Semnan and others. While was its first registrar, now it is moved to NIC-IR.

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