diff --git a/src/ScadaLink.CentralUI/Components/Pages/Notifications/NotificationReport.razor b/src/ScadaLink.CentralUI/Components/Pages/Notifications/NotificationReport.razor
index 207f402..a1e2c1e 100644
--- a/src/ScadaLink.CentralUI/Components/Pages/Notifications/NotificationReport.razor
+++ b/src/ScadaLink.CentralUI/Components/Pages/Notifications/NotificationReport.razor
@@ -266,7 +266,7 @@
                         <dd class="col-sm-9">@SiteName(d.SourceSiteId)</dd>
 
                         <dt class="col-sm-3">Source node</dt>
-                        <dd class="col-sm-9">@(string.IsNullOrEmpty(d.SourceNode) ? "—" : d.SourceNode)</dd>
+                        <dd class="col-sm-9">@(string.IsNullOrEmpty(_detail?.SourceNode) ? "—" : _detail.SourceNode)</dd>
 
                         <dt class="col-sm-3">Source instance</dt>
                         <dd class="col-sm-9">@(string.IsNullOrEmpty(d.SourceInstanceId) ? "—" : d.SourceInstanceId)</dd>
diff --git a/src/ScadaLink.CentralUI/Components/Pages/SiteCalls/SiteCallsReport.razor b/src/ScadaLink.CentralUI/Components/Pages/SiteCalls/SiteCallsReport.razor
index 511c24c..d24af8c 100644
--- a/src/ScadaLink.CentralUI/Components/Pages/SiteCalls/SiteCallsReport.razor
+++ b/src/ScadaLink.CentralUI/Components/Pages/SiteCalls/SiteCallsReport.razor
@@ -267,7 +267,7 @@
                             <dd class="col-sm-9">@SiteName(det.SourceSite)</dd>
 
                             <dt class="col-sm-3">Source node</dt>
-                            <dd class="col-sm-9">@(string.IsNullOrEmpty(d.SourceNode) ? "—" : d.SourceNode)</dd>
+                            <dd class="col-sm-9">@(string.IsNullOrEmpty(det.SourceNode) ? "—" : det.SourceNode)</dd>
 
                             <dt class="col-sm-3">Channel</dt>
                             <dd class="col-sm-9">@det.Channel</dd>
diff --git a/src/ScadaLink.Commons/Messages/Audit/SiteCallQueries.cs b/src/ScadaLink.Commons/Messages/Audit/SiteCallQueries.cs
index 93658c5..4245e3c 100644
--- a/src/ScadaLink.Commons/Messages/Audit/SiteCallQueries.cs
+++ b/src/ScadaLink.Commons/Messages/Audit/SiteCallQueries.cs
@@ -119,7 +119,8 @@ public sealed record SiteCallDetail(
     DateTime CreatedAtUtc,
     DateTime UpdatedAtUtc,
     DateTime? TerminalAtUtc,
-    DateTime IngestedAtUtc);
+    DateTime IngestedAtUtc,
+    string? SourceNode = null);
 
 /// <summary>
 /// Site Calls UI -> Central: request for the global <c>SiteCalls</c> KPI summary.
diff --git a/src/ScadaLink.Commons/Messages/Notification/NotificationOutboxQueries.cs b/src/ScadaLink.Commons/Messages/Notification/NotificationOutboxQueries.cs
index 27bd888..e6b6365 100644
--- a/src/ScadaLink.Commons/Messages/Notification/NotificationOutboxQueries.cs
+++ b/src/ScadaLink.Commons/Messages/Notification/NotificationOutboxQueries.cs
@@ -119,7 +119,8 @@ public record NotificationDetail(
     DateTimeOffset CreatedAt,
     DateTimeOffset? LastAttemptAt,
     DateTimeOffset? NextAttemptAt,
-    DateTimeOffset? DeliveredAt);
+    DateTimeOffset? DeliveredAt,
+    string? SourceNode = null);
 
 /// <summary>
 /// Outbox UI -> Central: request for the notification outbox KPI summary.
diff --git a/src/ScadaLink.NotificationOutbox/NotificationOutboxActor.cs b/src/ScadaLink.NotificationOutbox/NotificationOutboxActor.cs
index c7a91ef..8fc6956 100644
--- a/src/ScadaLink.NotificationOutbox/NotificationOutboxActor.cs
+++ b/src/ScadaLink.NotificationOutbox/NotificationOutboxActor.cs
@@ -749,7 +749,8 @@ public class NotificationOutboxActor : ReceiveActor, IWithTimers
             notification.CreatedAt,
             notification.LastAttemptAt,
             notification.NextAttemptAt,
-            notification.DeliveredAt);
+            notification.DeliveredAt,
+            notification.SourceNode);
 
         return new NotificationDetailResponse(
             request.CorrelationId, Success: true, ErrorMessage: null, detail);
diff --git a/src/ScadaLink.SiteCallAudit/SiteCallAuditActor.cs b/src/ScadaLink.SiteCallAudit/SiteCallAuditActor.cs
index 7539f3a..cfc29ce 100644
--- a/src/ScadaLink.SiteCallAudit/SiteCallAuditActor.cs
+++ b/src/ScadaLink.SiteCallAudit/SiteCallAuditActor.cs
@@ -652,7 +652,8 @@ public class SiteCallAuditActor : ReceiveActor
             CreatedAtUtc: row.CreatedAtUtc,
             UpdatedAtUtc: row.UpdatedAtUtc,
             TerminalAtUtc: row.TerminalAtUtc,
-            IngestedAtUtc: row.IngestedAtUtc);
+            IngestedAtUtc: row.IngestedAtUtc,
+            SourceNode: row.SourceNode);
     }
 
     /// <summary>
diff --git a/tests/ScadaLink.NotificationOutbox.Tests/NotificationOutboxActorQueryTests.cs b/tests/ScadaLink.NotificationOutbox.Tests/NotificationOutboxActorQueryTests.cs
index a7fa0e4..4f71714 100644
--- a/tests/ScadaLink.NotificationOutbox.Tests/NotificationOutboxActorQueryTests.cs
+++ b/tests/ScadaLink.NotificationOutbox.Tests/NotificationOutboxActorQueryTests.cs
@@ -354,6 +354,7 @@ public class NotificationOutboxActorQueryTests : TestKit
         row.ResolvedTargets = "[\"ops@example.com\",\"oncall@example.com\"]";
         row.TypeData = "{\"priority\":\"high\"}";
         row.SourceScript = "HighLevelAlarm.csx";
+        row.SourceNode = "node-a";
         row.SiteEnqueuedAt = DateTimeOffset.UtcNow.AddMinutes(-5);
         row.DeliveredAt = DateTimeOffset.UtcNow;
         _repository.GetByIdAsync(row.NotificationId, Arg.Any<CancellationToken>()).Returns(row);
@@ -377,6 +378,10 @@ public class NotificationOutboxActorQueryTests : TestKit
         Assert.Equal("instance-42", detail.SourceInstanceId);
         Assert.Equal(2, detail.RetryCount);
         Assert.Equal("transient blip", detail.LastError);
+        // SourceNode flows through the detail projection so the report detail
+        // modal binds uniformly to the detail record (was previously read off
+        // the summary).
+        Assert.Equal("node-a", detail.SourceNode);
     }
 
     [Fact]
diff --git a/tests/ScadaLink.SiteCallAudit.Tests/SiteCallAuditActorTests.cs b/tests/ScadaLink.SiteCallAudit.Tests/SiteCallAuditActorTests.cs
index 0d6fd26..d181413 100644
--- a/tests/ScadaLink.SiteCallAudit.Tests/SiteCallAuditActorTests.cs
+++ b/tests/ScadaLink.SiteCallAudit.Tests/SiteCallAuditActorTests.cs
@@ -402,7 +402,8 @@ public class SiteCallAuditActorTests : TestKit, IClassFixture<MsSqlMigrationFixt
         var repo = new SiteCallAuditRepository(context);
         var actor = CreateActor(repo);
 
-        await repo.UpsertAsync(NewRow(id, siteId, status: "Attempted", retryCount: 2, lastError: "503"));
+        await repo.UpsertAsync(NewRow(
+            id, siteId, status: "Attempted", retryCount: 2, lastError: "503", sourceNode: "node-a"));
 
         actor.Tell(new SiteCallDetailRequest("corr-d1", id.Value), TestActor);
 
@@ -414,6 +415,9 @@ public class SiteCallAuditActorTests : TestKit, IClassFixture<MsSqlMigrationFixt
         Assert.Equal(2, response.Detail.RetryCount);
         Assert.Equal("503", response.Detail.LastError);
         Assert.Equal(siteId, response.Detail.SourceSite);
+        // SourceNode flows through ToDetail so the report detail modal binds
+        // uniformly to the detail record (was previously read off the summary).
+        Assert.Equal("node-a", response.Detail.SourceNode);
     }
 
     [SkippableFact]