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bl.0spam.org - Main DNSBL
rbl.0spam.org - Realtime Blacklist, 100% automated. Listings are removed automatically after the IP stops sending spam.

The following lists should not be used as a sole method for identifying spam.

nbl.0spam.org - Network Blacklist, lists spam source networks with multiple IP listings within a single Class C IP block. Each time an nbl listing is made, the system notifies the netblock owner's abuse contact. If they fail to addressed the abuse, the listing will remain in place.
Note: All offending IP's within a block must be removed in order for the NBL listing to be removed.
Providers are instructed to use caution with this list, it is not intended to be used alone. This list includes full Class C network listings that have been found to be non-responsive and a source for higher volume of spam trap hits but it is also likely good email may also come from these networks.
dbl.0spam.org - Domain Blacklist, lists IP's of domains found to be in spam emails.

Only fully compliant Network Asset Management service members are on these lists.