diff --git a/ipv6/bd.cidr b/ipv6/bd.cidr
index 8b62d638..89e461c9 100644
--- a/ipv6/bd.cidr
+++ b/ipv6/bd.cidr
@@ -201,6 +201,7 @@
 2001:df1:3400::/48
 2001:df1:3480::/48
 2001:df1:3680::/48
+2001:df1:3a40::/48
 2001:df1:3b00::/48
 2001:df1:4680::/48
 2001:df1:4a80::/48