diff --git a/ipv6/co.cidr b/ipv6/co.cidr
index c7b509fe..7a7c8f28 100644
--- a/ipv6/co.cidr
+++ b/ipv6/co.cidr
@@ -161,6 +161,7 @@
 2801:1f:c800::/48
 2801:1f:d000::/48
 2801:1f:f000::/48
+2801:101::/40
 2801:102::/44
 2801:106::/44
 2801:108::/44