diff --git a/ipv6/us.cidr b/ipv6/us.cidr
index 1c8ffe1a0..9f26f9804 100644
--- a/ipv6/us.cidr
+++ b/ipv6/us.cidr
@@ -1043,6 +1043,7 @@
 2602:81c:8000::/44
 2602:81c:9000::/44
 2602:81c:a000::/44
+2602:f4f5::/40
 2602:f4f6::/40
 2602:f4f7::/40
 2602:f4f8::/40