The 0Spam.com IP Blacklist is a database containing the IP addresses and "spam scores" of E-mail from all over the world. There are currently over 2.7 million entries in this database, which is updated weekly.

Useful for making your own anti-spam software or setting up IP address filters for your E-mail server. The database is simple enough to be used on any operating system and the format is as follows: [IP address][Tab][Spam score].Instructions on how to use the database are included.