U-4.at is tracked by us since April, 2011. Over the time it has been ranked as high as 1 863 899 in the world, while most of its traffic comes from Austria, where it reached as high as 14 286 position. It was owned by several entities, from IVGM1988143-NICAT tech-c: MH733713-NICAT to Florian Skrivan of U4 Center DiskothekbetriebsgmbH, it was hosted by Amazon Technologies Inc., Google LLC and others.

U-4 has a high Google pagerank and bad results in terms of Yandex topical citation index. We found that U-4.at is poorly ‘socialized’ in respect to any social network. According to MyWot and Google safe browsing analytics, U-4.at is quite a safe domain with no visitor reviews.