diff --git a/ipv6/us.cidr b/ipv6/us.cidr
index 2c53f7469..8491e449d 100644
--- a/ipv6/us.cidr
+++ b/ipv6/us.cidr
@@ -3211,6 +3211,7 @@
 2604:15c0::/32
 2604:15e0::/32
 2604:1600::/32
+2604:1620::/32
 2604:16c0::/32
 2604:1840::/32
 2604:1880::/32