keyplyr - 1:10 am on Apr 21, 2013 (gmt 0)
These ranges have changed since 2012.
Five are subnets of PacketExchange.
A few are new, others (old threads) are no longer leased.
That's an important dynamic... ranges change. I don't know about anyone else, but I have close to 2k ranges in my block list and I have NEVER gone through, one-by-one, and rechecked to see if any have changed. The only time I catch it is by chance when adding a new range that might overlap, and I've caught dozens this way.
The only consolatory aspect might be that these ranges would likely be absorbed into or released to the very same type companies, and not to an ISP, but that's academic.