diff --git a/ex/as212/as212.go b/ex/as212/as212.go
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+++ b/ex/as212/as212.go
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+// Copyright 2011 Miek Gieben. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// An AS212 blackhole DNS server. Similar to the one found in evldns.
+// Also see https://www.as112.net/
+
+