diff --git a/etc/namedb/named.conf b/etc/namedb/named.conf
index 8b9ffe726bd1..27c30aed1cf3 100644
--- a/etc/namedb/named.conf
+++ b/etc/namedb/named.conf
@@ -91,6 +91,11 @@ zone "." { type hint; file "/etc/namedb/named.root"; };
 
 	To use this mechanism, uncomment the entries below, and comment
 	the hint zone above.
+
+	As documented at http://dns.icann.org/services/axfr/ these zones:
+	"." (the root), ARPA, IN-ADDR.ARPA, IP6.ARPA, and ROOT-SERVERS.NET
+	are availble for AXFR from these servers on IPv4 and IPv6:
+	xfr.lax.dns.icann.org, xfr.cjr.dns.icann.org
 */
 /*
 zone "." {