diff --git a/address.json b/address.json
index 84c4e05e7..48323ea17 100644
--- a/address.json
+++ b/address.json
@@ -9,6 +9,9 @@
   "dot4.top": [
     "1Z5ohZkHN4TjWeKpcA3tqpd4uNSA3r9fzsEG9aviDUWAeo2"
   ],
+  "dot21.net": [
+    "1Z5ohZkHN4TjWeKpcA3tqpd4uNSA3r9fzsEG9aviDUWAeo2"
+  ],
   "dotevent.org": [
     "12759G1BVPC7cAb5tT8qLzDJUcnBuyW3n3icMwAA8uWGiUtT",
     "1ZkzFrJ3jecDVQ4oLWJ2fEftUUc2aSAyN8kAPLrV2dFJt3K"