Abusive Hosts Blocking List

IRC network/server operators can now easily fight abuse coming from TOR nodes. Using a script such as the one here for Eggdrop in a major channel can help keep flooders and other annoying and abusive individuals from causing a problem.

WE DO NOT RECOMMEND USING THIS LIST FOR BLOCKING SMTP TRAFFIC.

DNSbl zone name: tor.ahbl.org

Format of queries:
Take IP address wishing to be checked, reverse the octets (1.2.3.4 becomes 4.3.2.1) and prepended to the zone above.

Example query: 2.0.0.127.tor.ahbl.org

Response Codes:
127.0.0.2 - Host running TOR (either as a transit node or exit point)
127.0.0.3 - Host running a TOR exit node
127.0.0.4 - Host recently seen running a TOR exit node on EFNet.

Please contact us before using by e-mailing admins@2mbit.com. If you are a large provider with many customers, or are planning to do more then 100,000 queries per day, you must contact us to confirm that this is ok. We may require you to setup your own AHBL mirror server locally to reduce the load on our systems.