Blacklisting IP's is typically based on the behavior of the address. More importantly, networks tend to be listed if a certain percentage of addresses on it sen

Blacklisting IP's is typically based on the behavior of the address. More importantly, networks tend to be listed if a certain percentage of addresses on it send spam, act like a bot, etc. Location databases are based on the owner of the netblock. There are still networks in in IPv6. Typically, with IPv6, MAC addresses take up the right 48 bits of the 128 bit IPv6 address. other 90 bits are used for subnetting/routing. The new spam and location databases will focus on these 90 bits, just like location databases usually focus on the /24.