Enumerate available domains generated modifying the original domain name through different cybersquatting techniques
Open source
6 alternativesColumbus Project
Discover subdomains and review DNS history through the Columbus subdomain discovery service.
About Columbus Project
Columbus is an API-first subdomain discovery service with DNS history. A lookup request returns subdomains as a JSON array by default, or as plain text for shell scripts. Its data comes from Certificate Transparency logs and a contributed DNS server. The code is published on GitHub under the Apache-2.0 license, and the project can be self-hosted from the source.
Pricing is not clearly stated.
Key features
- Scanner parses certificates from a CT log into the Columbus database
- Frontend built with HTML, tailwindcss and DaisyUI
Watch out for
- Not meant for use as a daily DNS resolver
Columbus Project at a glance
- Category
- Privacy & Security › Website & URL Scanners
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Details verified
- Oct 21, 2026 · Official source
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Columbus Project FAQ
How can I contribute data to Columbus?
Point your DNS servers at the Columbus DNS server while enumerating subdomains. Only domains with valid answers are sent to the server.
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