diff --git a/srv/poe_manager/app.py b/srv/poe_manager/app.py
index f1eda48..f26fab9 100644
--- a/srv/poe_manager/app.py
+++ b/srv/poe_manager/app.py
@@ -123,7 +123,7 @@ def index():
 
     grouped_devices = defaultdict(list)
     for d in devices:
-        first_letter = d[1][0].upper()
+        first_letter = d[1][:2].upper()
         grouped_devices[first_letter].append(d)
 
     # Intervall aus DB laden