diff --git a/data/spot.py b/data/spot.py
index 855c689..ab33d2b 100644
--- a/data/spot.py
+++ b/data/spot.py
@@ -393,6 +393,22 @@ class Spot:
                 elif self.dx_call.upper().endswith(ActivityName.MARITIME_MOBILE):
                     self.sig = ActivityName.MARITIME_MOBILE
 
+            # Alright, now let's get really fancy. Check if the DX callsign matches one taking part in a currently
+            # running DXpedition which we know from the alerts list.
+            if self.dx_call and not self.sig:
+                now = datetime.now(pytz.UTC).timestamp()
+                for alert in DATA_STORE.alerts.values():
+                    if (
+                        alert.sig == ActivityName.DXPEDITION
+                        and alert.dx_calls
+                        and alert.start_time
+                        and alert.end_time
+                        and alert.start_time < now < alert.end_time
+                        and self.dx_call.upper() in [c.upper() for c in alert.dx_calls if c]
+                    ):
+                        self.sig = ActivityName.DXPEDITION
+                        break
+
             # Parse "de_grid -> dx_grid" structures from the comment
             if self.comment:
                 grid_mode_grid_match = re.search(