The Icom UK D-STAR repeater, GB7IC is approaching 2000 D-STAR callsign registrations. GB7IC's first registration was in April 2008, and ten years later nearly 2000 people have registered via the repeater to the gateway.
D-STAR is the worlds most popular digital amateur radio network with currently 1652 repeaters globally*.
In the UK, there are currently, 77 operational D-STAR repeaters with another 12 licensed and more coming online. Many, many more callsigns are registered on these other repeaters.
More information about D-Star - http://www.d-staruk.co.uk