diff --git a/util/reserved-domains.json b/util/reserved-domains.json
index 7e02041fa..65951f930 100644
--- a/util/reserved-domains.json
+++ b/util/reserved-domains.json
@@ -15,13 +15,18 @@
     "notifications",
     "notify",
     "ns",
-    "ns[1-9]",
+    "ns[1-99]",
+    "official",
     "redirect",
     "registry",
     "security",
+    "staff",
+    "test",
+    "tld",
     "url",
+    "url[1-9999]",
     "whois",
-    "www[1-9]",
+    "www[1-99]",
     "wwww",
     "your-domain-name"
 ]