The Hacker‘s ChoiceDec 16

THC Release 💥: The world’s largest IP<>Domain database: https://ip.thc.org

All forward and reverse IPs, all CNAMES and all subdomains of every domain. For free.

Updated monthly.

Try: curl https://ip.thc.org/1.1.1.1

Raw data: https://ip.thc.org/docs/bulk-data-access

(The fine work of messede 👌)

What does everyone think? Need feedback before release tomorrow :)

Show threadFrederik Braun �Dec 16
@thc is there a write-up on how the collection was performed? Is this IPv4 -> Domain and back based on enumerating all IP addresses or do you go through other sources e.g., CT logs?
Show threadMessede
@freddy
1. Certificate transparency logs
2. Reverse DNS lookups
3. Commoncrawl indexes
4. ICANN CZDS root files
.... And friends of course
Dec 16 at 4:53pmWeb
Show threadFrederik Braun �Dec 16
@messede thanks for the detailed response. That almost deserves its own doc somewhere. :) impressive collection.