diff --git a/data/inet6num/fddd:0817:5c::_48 b/data/inet6num/fddd:0817:5c::_48
index a484e1a24..1ee31b238 100644
--- a/data/inet6num/fddd:0817:5c::_48
+++ b/data/inet6num/fddd:0817:5c::_48
@@ -1,4 +1,4 @@
-inet6num:           fddd:0817:5c00:0000:0000:0000:0000:0000 - fddd:0817:5c00:ffff:ffff:ffff:ffff:ffff
+inet6num:           fddd:0817:5c00:0000:0000:0000:0000:0000 - fddd:0817:5cff:ffff:ffff:ffff:ffff:ffff
 cidr:               fddd:0817:5c::/48
 netname:            MARY-NETWORK
 descr:              Network of MARY