QBE: Sun Prairie

Decommissioned
Facility permanently shut down and decommissioned
Operated by:

QBE: Sun Prairie

Year Built: 2008
Utility Provider: Sun Prairie Water & Light
Ownership: QBE Insurance Group derby district holdings llc owns the campus since october 2025. the building.
░░░░░░ Interested in this information? Contact us SqFt
Gross Colocation Size

QBE North America ran a data center on its former General Casualty campus in Sun Prairie, northeast of Madison, which became one of QBE's two global data centers. A later project combined the original two data rooms into one larger room with A and B UPS systems, N+1 standby generation and hot and cold aisle containment, completed while the room stayed live.

QBE sold the campus to Derby District Holdings in October 2025. The new owner markets the former data center space in Building 300, with raised floors, battery and generator backup and multiple fiber providers, as part of its Derby District redevelopment.

Site History

  • February 2026: The new owner begins marketing the former data center space for lease.
  • October 2025: QBE sells the Sun Prairie campus to Derby District Holdings.
  • 2008: The Sun Prairie campus is slated to become one of QBE's two global data centers.

Map and Nearby Locations

1 QBE Way
QBE Insurance Group Sites
Nearby Facilities

QBE: Sun Prairie Power Growth Over Time

Operational
Construction
Planned
Prospective
Land Bank
In Doubt
Currently Operational
across NN Request Dataset sites
Under Construction
NN Request Dataset sites currently building
Planned / Prospective
NN Request Dataset sites announced, but haven't started construction

Sites within 15 miles of QBE: Sun Prairie

Distance Site About
2.48 miles Verizon: 117 N Bristol St, Sun Prairie
2.54 miles American Family Insurance: Madison HQ
American Family Insurance runs an enterprise data center at its national headquarters campus at 6000 American Parkway in Madison, Wisconsin.
5.65 miles Brightspeed: 145 E Holum St, DeForest
7.45 miles AT&T: 215 Kedzie St
8.37 miles QTS: Vienna Expansion
Later phases of QTS Data Centers' proposed campus in the Town of Vienna, Wisconsin, withdrawn in 2026 when QTS chose a site in Iowa.
8.88 miles T-Mobile: Madison
9.17 miles QTS: Vienna, Wisconsin
QTS Data Centers proposed a large data center campus in the Town of Vienna, north of Madison, Wisconsin, in 2025. It withdrew in 2026 and chose a site in Iowa.
9.33 miles AT&T: 729 Pflaum Rd
9.55 miles Lumen: 710 E Mifflin St
9.56 miles Wisconsin DET: Femrite Data Center
The Femrite Data Center at 5830 Femrite Drive in Madison is the State of Wisconsin's primary data center, run by the Department of Administration's Division of Enterprise Technology since 2006.
9.93 miles EdgeConnex Madison
EdgeConneX's MAD01 edge data center occupies a pod in the Dane County Data Exchange I building at 4916 East Broadway in Madison, Wisconsin.
9.95 miles Dane County Data Exchange I
Dane County Data Exchange I is a carrier-neutral data center building at 4916 East Broadway in Madison, Wisconsin, home to EdgeConneX's Madison edge data center and shell space for lease.
10.25 miles AT&T: 122 W Main St
10.27 miles US Signal: WI01 Madison
US Signal's WI01 data center occupies Suite 1 of the Network222 carrier hotel on Madison's Capitol Square and anchors the company's Wisconsin fiber network.
10.27 miles Network222
Network222 is the ten-story carrier hotel at 222 West Washington Avenue on Madison's Capitol Square. It houses the 5NINES and US Signal data centers and a Madison Internet Exchange (MadIX) switch.
10.29 miles 5Nines
5NINES runs a colocation data center in Suite 170 of Network222, the carrier hotel at 222 West Washington Avenue in downtown Madison, Wisconsin. ResTech Services has owned the 5NINES data center business since October 2023.
10.74 miles Lumen Madison 1
Lumen Madison 1 is a Lumen colocation and network site in the Sunkist Building at 612 West Main Street in Madison, Wisconsin.
11.01 miles AT&T: 1001 Spring St
11.01 miles UW-Madison: DoIT Data Center
UW-Madison's DoIT data center fills the basement of the Computer Sciences and Statistics building at 1210 West Dayton Street. It hosts campus research computing and one of the two Madison Internet Exchange (MadIX) switches.
12.26 miles AT&T: 2802 Sylvan Ave
14.21 miles TDS: 1912 Parmenter St, Middleton
14.89 miles AT&T: 2002 Reetz Rd
15.20 miles CDW: Fitchburg
Berbee Information Networks opened its first data center in 1999 at its headquarters at 5520 Research Park Drive in Fitchburg, Wisconsin. CDW bought Berbee in 2006 and later closed the data center; Promega bought the building in 2024.
15.22 miles TDS: Middleton Data Center
The former TDS Data Center occupies Suite 230 of the Wisconsin Trade Center office building at 8401 Greenway Boulevard in Middleton, Wisconsin. TDS has since left, and the landlord markets the suite for lease.
15.44 miles SupraNet Madison
SupraNet runs a SOC 2 Type II colocation data center at 8000 Excelsior Drive on Madison's west side, serving more than 100 customers.
15.80 miles US Signal: WI02 Madison
US Signal's WI02 data center at 5515 Nobel Drive in Fitchburg, just south of Madison, Wisconsin, is the largest colocation facility in the Madison market. US Signal bought it with OneNeck from TDS in 2024.

Operating Company

Operated by:

QBE Insurance Group Limited is an Australian multinational general insurance and reinsurance company, listed on the Australian Securities Exchange and headquartered in Sydney. It offers commercial, personal and specialty insurance and risk management products, and it employs about 13,500 people in 27 countries.

QBE's North American business took over the Sun Prairie, Wisconsin, campus of General Casualty, which became one of QBE's two global data centers. QBE sold the Sun Prairie campus in October 2025.

0
Facilities
0
Markets

Podcasts See all

Listen to E9 - Building Hyperscale AI Data Centers in Rural America With Wes Cummins
Listen to E8: Inside ERCOT, Black Start, Winter Storm Uri, and AI Data Center Load
Listen to E7:Now we are cooking with Gas! Behind the Meter Solutions with Nick Kruse
See More Podcasts
Get Started

Ready to Level Up Your Data Center Strategy?

Tell us what you're looking for. We respond within one business day.