diff --git a/ipv6/hk.cidr b/ipv6/hk.cidr
index e8411bea..0cc8dfc2 100644
--- a/ipv6/hk.cidr
+++ b/ipv6/hk.cidr
@@ -556,6 +556,7 @@
 2405:c2c0::/32
 2405:c300::/32
 2405:c740::/32
+2405:d1c0::/32
 2405:e300::/32
 2405:e500::/32
 2405:e580::/32