GeekWire has the details:
SpaceX confirmed that it will launch dozens of Starlink satellites in one go, as early as May 15, setting the stage for what’s expected to become a constellation of thousands of satellites providing global broadband data access from low Earth orbit.
The company’s president and chief operating officer, Gwynne Shotwell, laid out those details today at the Satellite 2019 conference in Washington, D.C. In an email exchange with GeekWire, SpaceX confirmed what Shotwell said but could add no further information.
[. . .]
Two test satellites, nicknamed TinTin A and B, were launched in February 2018, and Musk reported a year ago that the broadband connection was good enough for playing video games. But the spacecraft design is said to have changed significantly since then. The launch set for next week at Cape Canaveral Air Force Station in Florida will be the first to carry satellites reflecting the new design.
Shotwell characterized this first wave as a demonstration set, with no satellite-to-satellite communication links. Depending on how the demonstrations proceed, from two to six Starlink launches could follow by the end of this year, she said.
[. . .]
SpaceX has said it plans to start offering broadband service in the 2020-2021 time frame, and the company is facing an FCC requirement to put half of the satellites in its first constellation into operation by 2024.
The full GeekWire article is HERE.
“Dozens” of satellites on a single launch” One dozen is 12, two dozen would be 24, three dozen would be 36.
Update 05/12/19: We now know that SpaceX “dozens” are five dozen or 60 Starlinks per launch. See the 05/12/19 blog post.