diff --git a/app/controllers/env_controller.rb b/app/controllers/env_controller.rb
index 01868d5..114ced9 100644
--- a/app/controllers/env_controller.rb
+++ b/app/controllers/env_controller.rb
@@ -338,13 +338,17 @@ def list_services
       session_where_values << @pdb_name
     end
 
-    @services = sql_select_all ["SELECT v.*, s.Sessions
-                                 FROM   DBA_Services v
+    @services = sql_select_all ["SELECT v.*, s.Sessions, a.Active_Instances
+                                 FROM     DBA_Services v
                                  LEFT OUTER JOIN (SELECT /*+ NO_MERGE */ Service_Name, COUNT(*) Sessions
                                                   FROM gv$Session s
                                                   #{session_where_string}
                                                   GROUP BY Service_Name
                                                  ) s ON s.Service_Name = v.Name
+                                 LEFT OUTER JOIN (SELECT /*+ NO_MERGE */ Name, LISTAGG(Inst_ID, ', ') WITHIN GROUP (ORDER BY Inst_ID) Active_Instances
+                                                  FROM   gv$Active_Services
+                                                  GROUP BY Name
+                                                 ) a ON a.Name = v.Name
                                  #{where_string}
                                 "].concat(session_where_values).concat(where_values)
     render_partial
diff --git a/app/views/env/_list_services.html.erb b/app/views/env/_list_services.html.erb
index 86b97f5..1733a90 100644
--- a/app/views/env/_list_services.html.erb
+++ b/app/views/env/_list_services.html.erb
@@ -17,6 +17,7 @@
   column_options << {caption: 'ID',               data: proc{|rec| fn(rec.service_id)},                 title: "Unique ID for the service", align: :right}
   column_options << {caption: 'Name',             data: proc{|rec| rec.name},                           title: "Name of the service"}
   column_options << {caption: 'Network name',     data: proc{|rec| rec.network_name},                   title: "Network name used to connect to the service"}
+  column_options << {caption: 'Active instances', data: proc{|rec| rec.active_instances},               title: "RAC instances where the service is active"} if PanoramaConnection.rac?
   column_options << {caption: 'Sessions',         data: link_sessions,                                  title: "Number of currently connected sessions", align: :right}
   column_options << {caption: 'Creation',         data: proc{|rec| localeDateTime(rec.creation_date)},  title: "Date the service was created"}
   column_options << {caption: 'Failover method',  data: proc{|rec| rec.failover_method},                title: "Failover method (BASIC or NONE) for the service"}