dstiles - 9:26 pm on Sep 16, 2012 (gmt 0)

Lucy - the IP ranges may be rather short but my experience is: if you delve deeper they ultimately belong to a single organisation that sub-lets by country and in such circumstances the larger range can usually be entirely blocked.

In my ranges above I confined them, in some cases, to /24 and /23 because it would have taken too long to track down the larger ranges and I'd had no bad hits to make me reappraise them.