diff --git a/ipv6/ph.cidr b/ipv6/ph.cidr
index 0d04bad96..de7343117 100644
--- a/ipv6/ph.cidr
+++ b/ipv6/ph.cidr
@@ -122,6 +122,7 @@
 2001:df5:f600::/48
 2001:df6:d00::/48
 2001:df6:ec0::/48
+2001:df6:18c0::/48
 2001:df6:a700::/48
 2001:df6:b080::/48
 2001:df6:b300::/48