diff --git a/ipv6/us.cidr b/ipv6/us.cidr
index 27978320..f73107eb 100644
--- a/ipv6/us.cidr
+++ b/ipv6/us.cidr
@@ -966,6 +966,7 @@
 2602:817:d000::/36
 2602:818:d000::/40
 2602:818:e000::/44
+2602:f8f3::/40
 2602:f8f4::/40
 2602:f8f5::/36
 2602:f8f6::/40