diff --git a/ipv6/us.cidr b/ipv6/us.cidr
index 35f557696..2ba8d9920 100644
--- a/ipv6/us.cidr
+++ b/ipv6/us.cidr
@@ -1045,6 +1045,7 @@
 2602:81c:c000::/40
 2602:81c:d000::/40
 2602:81c:e000::/44
+2602:f478::/40
 2602:f479::/36
 2602:f47b::/40
 2602:f47c::/40