diff --git a/README.md b/README.md
index 2b43e8d..7b606e7 100644
--- a/README.md
+++ b/README.md
@@ -37,4 +37,11 @@ docker build . -t moanos/notfellchen:latest
 
 ```
 docker run -p8000:7345 moanos/notfellchen:latest
-```
\ No newline at end of file
+```
+
+## Geocoding
+
+Geocoding services (search map data by name, address or postcode) are provided via the
+[Nominatim](https://nominatim.org/) API, powered by [OpenStreetMap](https://openstreetmap.org) data. Notfellchen uses
+a selfhosted Nominatim instance to avoid overburdening the publicly hosted instance. Due to ressource constraints
+geocoding is only supported for Germany right now. 
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