diff --git a/docker/routlin-dash/app/config_utils.py b/docker/routlin-dash/app/config_utils.py
index 2abf8ca..cee5af8 100644
--- a/docker/routlin-dash/app/config_utils.py
+++ b/docker/routlin-dash/app/config_utils.py
@@ -707,6 +707,11 @@ def config_datasource(name):
 
     if name == 'blocklists':
         db_counts = _bl_db_counts()
+        used_by = {}
+        for v in vlans:
+            vlan_name = v.get('name', '')
+            for bl_name in v.get('use_blocklists', []):
+                used_by.setdefault(bl_name, []).append(vlan_name)
         rows = []
         for bl in cfg.get('dns_blocking', {}).get('blocklists', []):
             row = dict(bl)
@@ -725,6 +730,8 @@ def config_datasource(name):
             else:
                 row['local_entries']  = ''
                 row['source_display'] = row.get('url', '')
+            vlan_names = used_by.get(bl.get('name', ''), [])
+            row['used_by'] = json.dumps([{'n': n, 'd': n} for n in vlan_names])
             rows.append(row)
         return rows
 
diff --git a/docker/routlin-dash/app/pages/dnsblocking/content.json b/docker/routlin-dash/app/pages/dnsblocking/content.json
index e5b6724..e32c52a 100644
--- a/docker/routlin-dash/app/pages/dnsblocking/content.json
+++ b/docker/routlin-dash/app/pages/dnsblocking/content.json
@@ -36,6 +36,11 @@
           "label": "Source",
           "field": "source_display",
           "class": "col-mono"
+        },
+        {
+          "label": "Used By",
+          "field": "used_by",
+          "render": "tag_list"
         }
       ],
       "row_actions": [