Yeah-- we do specific IP addresses and not ranges. We thought at first they were all different, but they weren't. There were hundreds of different, but lots with of multiple spam posts, some every day. Group them by IP address and you should see some that are bugging you all the time.
Hard to say though-- could be a different "shape" to your spam than what we get.
Hard to say though-- could be a different "shape" to your spam than what we get.