diff --git a/lib/libc/net/hosts b/lib/libc/net/hosts
--- a/lib/libc/net/hosts
+++ b/lib/libc/net/hosts
@@ -17,14 +17,14 @@
 #10.0.0.2		myname.my.domain myname
 #10.0.0.3		myfriend.my.domain myfriend
 #
-# According to RFC 1918, you can use the following IP networks for
-# private nets which will never be connected to the Internet:
+# According to RFC 1918, you can use the following IP blocks for
+# private internets:
 #
-#	10.0.0.0	-   10.255.255.255
-#	172.16.0.0	-   172.31.255.255
-#	192.168.0.0	-   192.168.255.255
+#	10.0.0.0	-   10.255.255.255	(10/8 prefix)
+#	172.16.0.0	-   172.31.255.255	(172.16/12 prefix)
+#	192.168.0.0	-   192.168.255.255	(192.168/16 prefix)
 #
-# In case you want to be able to connect to the Internet, you need
+# In case you want to make addresses available on the Internet, you need
 # real official assigned numbers.  Do not try to invent your own network
 # numbers but instead get one from your network provider (if any) or
 # from your regional registry (ARIN, APNIC, LACNIC, RIPE NCC, or AfriNIC.)