Big Fiber completed the latest expansion of its San Francisco Bay Area dark fiber network.

The 6,000-foot buildout sees the firm extend high-speed, low-latency connectivity to CoreSite’s SV1 data center in San Jose. Tenants of the interconnection hub can now have access to Big Fiber’s wider dark fiber network, which already spans more than 65 interconnected data centers. It’s also connected to CoreSite facilities in Milpitas and Santa Clara via the vendor’s own optical (lit) fiber.

“The addition of Big Fiber to our SV1 data center enhances the value we provide to our tenants by offering them new, diverse dark fiber routes that are essential for navigating today’s data-heavy environment,” said Matt Senderhauf, CoreSite’s VP of interconnection strategy.

Founded in 2019 and formerly known as Bandwidth IG, Big Fiber develops dark fiber routes capable of supporting data centers, enterprises, and cloud providers. The vendor touts its network as capable of supporting AI buildout, arguing that legacy fiber networks in the Bay Area have become tapped out.

Its San Francisco network extends across more than 310 route miles and 2 million fiber miles to connect some of the tech hub’s most critical data centers.

“By investing in this new infrastructure, we provide our customers with paths that bypass the congestion of legacy networks,” Big Fiber Chief Commercial Officer Patton Lochridge explained. “We’re fully committed to providing more options for our customers to access new networks critical for AI workloads in one of the most dynamic data center markets in the world.”

In addition to serving the Bay Area, Big Fiber also operates dark fiber networks across Atlanta and Portland, Oregon.