In addition, radio.net can be listened to on SONOS devices.
You can also get radio.net on your TV via Apple's TVoS and Amazon Fire TV.
Other internet radio devices, however, do not have access to the radio.net database. Due to the fact that other devices may be connected to other databases, you may find a different variety of stations on offer.
A few years ago, there was integration with Logitech's Squeezebox, which unfortunately cannot be supported anymore.