diff --git a/ipv6/us.cidr b/ipv6/us.cidr
index 687d920c5..087e7a5cd 100644
--- a/ipv6/us.cidr
+++ b/ipv6/us.cidr
@@ -2394,6 +2394,7 @@
 2605:aa00::/32
 2605:aa40::/32
 2605:aa80::/32
+2605:aac0::/32
 2605:ab80::/32
 2605:ac80::/32
 2605:ad00::/32