Orange Belgium is a cellular network provider offering a 2G/3G/4G and cellular IoT network. This tutorial highlights how you can use Orange as your NB-IoT Service Provider on AllThingsTalk Maker.
Connecting to the Orange NB-IoT network
Depending on your subscription you need to configure the APN (Access Point Name) according:
You purchased an Orange NB-IoT Rapid Development Kit and SIM card: starter.att.iot