From the FAQ: Q: Does Coronalert also work abroad? A: Possibly in the near future. Coronalert is built on the European open standard DP3T (Decentralized Priv

From the FAQ: Q: Does Coronalert also work abroad? A: Possibly in the near future. Coronalert is built on the European open standard DP3T (Decentralized Privacy-Preserving Proximity Tracing). In many countries, including Germany, Ireland, Italy, Croatia, the Netherlands, Austria and Switzerland, similar apps are already active, which can technically work with Coronalert. A European hub for exchanging information on Covid-19 infections is currently under construction. Only when the European exchange node will be active, you should be able to use Coronalert in several countries, or detect a contact with foreign app users in Belgium.