diff --git a/ipv6/ph.cidr b/ipv6/ph.cidr
index 1267fa17f..77f914d69 100644
--- a/ipv6/ph.cidr
+++ b/ipv6/ph.cidr
@@ -120,6 +120,7 @@
 2400:bd40::/32
 2400:bd60::/32
 2400:c3a0::/32
+2400:c3e0::/32
 2400:c440::/32
 2400:e6c0::/32
 2400:f200::/32