The mailspike services are intended to provide all receivers and reputation providers a baseline of data to help block the senders with the worst reputations. All IP addresses listed these lists are being continually monitored and the lists are updated frequently.
The z.mailspike.net lists all IP addresses seen participating in a distributed spam wave.
Is the information on our site wrong or incomplete? You don't want us to monitor your blacklist? Or do you operate a similar blacklist? We would like to hear from you!