diff --git a/ipv6/us.cidr b/ipv6/us.cidr
index 712a15d48..7ba844d30 100644
--- a/ipv6/us.cidr
+++ b/ipv6/us.cidr
@@ -1048,6 +1048,7 @@
 2602:81d:2000::/40
 2602:81d:3000::/44
 2602:81d:4000::/40
+2602:f426::/40
 2602:f427::/40
 2602:f428::/40
 2602:f429::/40