Proficiency.org is tracked by us since February, 2018. Over the time it has been ranked as high as 2 027 399 in the world, while most of its traffic comes from Mexico, where it reached as high as 55 902 position. It was owned by several entities, from National Association of National Association for Proficiency Testing to National Association for Proficiency Testing, it was hosted by Microsoft Corporation and Northern Valley Communications LLC.

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