Wave Broadband today announced the acquisition of ReallyFast.net, a Seattle-based internet service provider for multi-unit residential and office buildings.

Founded in 2009 by Robert Muller and Joe Erickson, ReallyFast originally started so the founders could have faster internet for their IT business. Once they built a connection with gigabit speeds, other businesses showed interest. Today, the company provides internet to more than 40 buildings.

“Joining forces with Wave will allow ReallyFast’s employees to continue providing our residential and business customers with the high-quality personalized service they rely on, for the long-term,” Erickson said in a statement.

Wave, which serves more than 420,000 customers in Washington, Oregon, and California, has now made 17 acquisitions since its birth in 2003. The company bought Capacity Provisioning Incorporated in March 2014; it acquired Spectrum Networks in September 2013; and Wave swooped up Bellingham-based Black Rock in January 2013.

“We’re excited about the opportunity to bring our high-speed internet connectivity services to even more residents and businesses in the Seattle area,” Steve Weed, Wave CEO, said in a statement. “The team at ReallyFast shares our core belief that the number one focus is keeping the customer happy, and combined with the scale of Wave’s local resources, together we will thrive.”

Terms of the deal were not disclosed. Current ReallyFast customers should not expect any changes as a result of the acquisition.

Editor’s note: Wave Broadband is a GeekWire annual sponsor.