diff --git a/documentation/content/en/books/handbook/network/_index.adoc b/documentation/content/en/books/handbook/network/_index.adoc
--- a/documentation/content/en/books/handbook/network/_index.adoc
+++ b/documentation/content/en/books/handbook/network/_index.adoc
@@ -467,6 +467,11 @@
 |3 bits
 |global unicast
 |All global unicast addresses are assigned from this pool. The first 3 bits are `001`.
+
+|``2001:db8::/32,3fff::/20``
+|32 bits, 20 bits
+|documentation
+|IPv6 address prefix for use in documentation.
 |===
 
 For further information on the structure of IPv6 addresses, refer to http://www.ietf.org/rfc/rfc3513.txt[RFC3513].