Search
Security
Explore
Utils
API
About

DomainLens is independent and free to use. Servers and data providers are funded out of pocket. If it's useful to you, a small contribution helps keep it running. Support DomainLens

Account

Keys, usage and sign-in details.

DomainLens

One hostname map per apex domain — certificate transparency and passive DNS from several providers, merged, resolved, scored and kept up to date.

Product

Subdomain search
Explore the index
DNS & TLS utilities
API reference
About us
Buy me a coffee
Account & API keys

Tools

Certificate inspection
Mail authentication
DNS lookup
Security scoring

The dataset records observations, not liveness — a returned hostname is not necessarily resolving today. Use only against domains you are authorised to assess.