diff --git a/ipv6/bd.cidr b/ipv6/bd.cidr
index 38dddb811..08362a18b 100644
--- a/ipv6/bd.cidr
+++ b/ipv6/bd.cidr
@@ -441,6 +441,7 @@
 2400:3dc0::/32
 2400:3e60::/32
 2400:4420::/32
+2400:4520::/32
 2400:47c0::/32
 2400:4ac0::/32
 2400:4c40::/32