diff --git a/netx_api/ume_sync_service.py b/netx_api/ume_sync_service.py
index dbded27..a487bbd 100644
--- a/netx_api/ume_sync_service.py
+++ b/netx_api/ume_sync_service.py
@@ -73,10 +73,14 @@ def _derive_ne_id_from_alarm(alarm: dict[str, Any]) -> str:
     # Common UME formats observed:
     # 1) "<net_id>#<suffix>"
     # 2) "<net_id>, <x>, <y>"
+    # 3) "<net_id> <x> <y>"
     if "#" in alarm_key:
         return _s(alarm_key.split("#", 1)[0])
     if "," in alarm_key:
         return _s(alarm_key.split(",", 1)[0])
+    parts = [p for p in alarm_key.split() if p]
+    if len(parts) >= 2:
+        return _s(parts[0])
     return ""
 
 
diff --git a/tests/test_ume_sync.py b/tests/test_ume_sync.py
index 1a74453..24ef76e 100644
--- a/tests/test_ume_sync.py
+++ b/tests/test_ume_sync.py
@@ -486,6 +486,7 @@ class UmeSyncServiceTests(unittest.TestCase):
     def test_derive_ne_id_from_alarmkey_formats(self):
         alarm_hash = {"alarmkey": "00ceb960-1b62-478e-8303-0935ffea1d28#99010"}
         alarm_csv = {"alarmkey": "00ceb960-1b62-478e-8303-0935ffea1d28, 4237, 79"}
+        alarm_space = {"alarmkey": "00ceb960-1b62-478e-8303-0935ffea1d28 4205 3588"}
 
         self.assertEqual(
             _derive_ne_id_from_alarm(alarm_hash),
@@ -495,6 +496,10 @@ class UmeSyncServiceTests(unittest.TestCase):
             _derive_ne_id_from_alarm(alarm_csv),
             "00ceb960-1b62-478e-8303-0935ffea1d28",
         )
+        self.assertEqual(
+            _derive_ne_id_from_alarm(alarm_space),
+            "00ceb960-1b62-478e-8303-0935ffea1d28",
+        )
 
     def test_serialize_ume_alarm_raw_row_select_fields(self):
         alarm = UmeAlarmCurrent(