diff --git a/ipv6/mx.cidr b/ipv6/mx.cidr
index 68794240..38e9ca98 100644
--- a/ipv6/mx.cidr
+++ b/ipv6/mx.cidr
@@ -47,8 +47,7 @@
 2801:c4:a0::/48
 2801:c4:b0::/46
 2801:c4:b4::/48
-2801:c4:c0::/43
-2801:c4:e0::/44
+2801:c4:c0::/42
 2801:c5::/32
 2801:d0::/32
 2801:f0::/48