CoreSite Reston (VA3)
12369 Sunrise Valley Dr, Reston, VA, 20191, US
VA3 is the largest building on the Reston campus and the only one publishing real rack densities: 35 to 40 kW per cabinet air-cooled, and 30 to 70 kW per cabinet on liquid. It opened in October 2019 on the former Sunrise Technology Park site and has expanded since, most recently with an 8 MW hall completed in November 2024 carrying native 400G AWS Direct Connect. Cooling runs 1,500-ton magnetic-bearing chillers in N+2 against a 4,500-ton plate-frame heat exchanger, with 120,000 gallons of harvested rainwater behind a 260,000-gallon main tank. Every customer here has been matched to 100% renewable energy through Dominion since November 2021, and the building is NVIDIA DGX-Ready certified.
Facility Specifications
Site information
- Colocation space
- 533,000+ sq ft
- Power density
- 35-40 kW per cabinet air-cooled; 30-70 kW per cabinet liquid-cooled
- Uptime SLA
- 100% uptime SLA
Power & cooling
- Redundancy
- N+2 generators; four-to-make-three UPS with maintenance UPS; true 2N PDU and RPP distribution; N+2 chiller plant
- Cooling
- 1,500-ton magnetic-bearing chillers in N+2; 4,500-ton plate-frame heat exchanger for free cooling; variable-speed CRAHs with integrated humidification and air-side economization; 120,000-gallon rainwater harvesting plus 260,000-gallon main water tank
Compliance
Platforms & amenities
- Platforms & services
- Cabinets, private cages, private suites, rooftop space and build-to-suit; positioned for high-density, AI and HPC workloads
- Amenities
- WiFi; conference rooms; office space; tech lounge with kitchen, TVs and seating. 24x7x365 on-site security, key cards, biometric scanners, mantrap entries, perimeter and interior IP-DVR. Floor loading to 5,000 lb per cabinet; 10,000 lb freight elevator. 100% renewable-matched power via Dominion Energy since November 2021.
Network ecosystem — 14 carriers on-net
Notable: Cogent Communications (AS174) · Zayo (AS6461) · Microsoft (AS8075)
Cloud on-ramps
14 networks and 3 exchanges on-net: Any2East, Community IX Northern Virginia and MegaIX Ashburn, with Microsoft, Cogent, Zayo and Megaport among the connected networks. Native 400G AWS Direct Connect; Azure ExpressRoute, Google Cloud Interconnect, Oracle FastConnect, IBM Cloud, Alibaba Cloud via Open Cloud Exchange. Dark fiber to VA1, VA2 and CoreSite Washington DC.