BIG Fiber (formerly Bandwidth IG) has completed a 6,000-foot fibre buildout into CoreSite’s SV1 data centre in San Jose. The expansion establishes a presence across the major carrier hotels encircling the San Francisco Bay Area, creating a high-capacity dark fibre ring that connects more than 65 facilities.
The expansion into the 55 South Market Street facility is designed to address capacity constraints on legacy infrastructure. With AI adoption accelerating and regional data centre vacancy rates reaching record lows, the new deployment offers enterprise and hyperscale customers critical route diversity in the downtown San Jose corridor.
Second entrance provides physical path diversity
To ensure maximum resilience, BIG Fiber is implementing a second entrance into the CoreSite building. This provides physical path diversity for tenants who require redundant connectivity to avoid single points of failure. The operator’s wider San Francisco Bay Area network now spans more than 310 route miles, with 2 million fibre miles connecting the region’s primary data hubs.
Patton Lochridge, chief commercial officer at BIG Fiber says: "In dense environments like downtown San Jose, achieving true route diversity is an engineering challenge. By investing in this new infrastructure, we provide our customers with paths that bypass the congestion of legacy networks."
The company maintains a significant presence in major carrier hotels, including 200 Paul in San Francisco, 1100 Space Park Drive and 2820 Northwestern in Santa Clara, and the Great Oaks campus. This latest buildout completes BIG Fiber’s strategic footprint in San Jose.
Legacy congestion drives new build requirements
Matt Senderhauf, vice president of interconnection strategy at CoreSite, adds: "CoreSite is committed to providing our customers with a robust ecosystem of high-performance connectivity options," he said.
BIG Fiber’s 100% underground network is tailored for mission-critical data centres and hyperscalers. Beyond Silicon Valley, the operator maintains an extensive presence in Greater Portland and Greater Atlanta. Its Atlanta network spans 550 route miles connecting 30 data centres, while the Portland network serves 15 facilities over 20 route miles.
The company positioned the expansion as a direct response to the saturation of legacy fibre infrastructure. As organisations scale artificial intelligence (AI) workloads that require high-bandwidth and low-latency connectivity, new-build dark fibre is becoming a market necessity.
BIG Fiber is offering promotional rates for its Bay Area network to coincide with the completion of the SV1 connection. CoreSite, an American Tower subsidiary, continues to focus on providing cloud-enabled infrastructure to support high-density computing and AI applications.
