ATH3

ATH3 is the largest of the three buildings that make up Digital Realty's Athens Data Center Campus in Koropi, Attica, which the operator describes as the region's largest and most significant data center campus. At about 8,600 sqm (92,500 sq ft), ATH3 is more than double the size of its neighboring buildings ATH1 (3,300 sqm) and ATH2 (1,800 sqm), which share the same street address under a separate entrance. The building runs 2N UPS redundancy with N+2 cooling — the highest resiliency combination among the three Athens buildings — and Digital Realty reports it runs on 100% renewable and 100% carbon-free energy. Published certifications are narrower than at ATH1/ATH2, covering PCI-DSS and ISO 20000-1 plus LEED Gold for sustainability. Digital Realty positions the campus as sitting "at the crossroads of three continents," supporting internet content, financial-data and cloud workloads for the wider Southeast European region. Across all three buildings the operator reports more than 70 cloud and network service providers and 135+ customers on the combined campus; IT power capacity in MW and a year-opened date are not published for any of the three.