Keep these fields in the source log
- Asset and authorised scope
- Source, observation type and timestamp
- Observed relationship and remaining hypotheses
Public research resources · FR / EN
Domains and public infrastructure · OSINT
Which public observations clarify a domain without contacting its target ? Practical method, external tools, source log and interpretation limits.
External services · no results hosted here · queries sent only when you click a provider link.
Which public observations clarify a domain without contacting its target ?
- Define authorised domains and assets; distinguish index lookup from target interaction.
- Compare RDAP registration, DNS, certificates and already published observations.
- Record every timestamp and examine subdomain relationships without equating shared IP with common ownership.
- Inspect existing analyses first; assess publication and target visits before an external submission.
What the method cannot establish alone
IIS performs no scan. At a third party, submitting a URL may trigger a visit and publication; never transmit tokens, private access or confidential files.
External tools for this pathway
Editorial selection of external services and resources, described using their portals or documentation. References reviewed on 3 October 2026; availability, prices, quotas and interface languages can change. Subscriptions and paid features were not tested.
7 catalogue entries
ICANN Lookup · RDAP ↗
Consult public domain registration data.
Limit: Registrants may be redacted; a registrar or technical contact is not the website author.
crt.sh ↗
Find domain names in certificates published in CT logs.
Limit: A certificate may be expired or unused; it does not establish current control.
Google Public DNS ↗
Inspect public DNS records with the requested record type.
Limit: Resolution, cache and date matter; a shared IP does not establish a relationship between customers.
Shodan ↗
Inspect indexed observations of Internet-facing assets and services.
Limit: Keep research within authorised scope; an old observation is not a current scan.
Censys ↗
Access an Internet infrastructure and certificate observation platform.
Limit: Access, platform and quotas evolve; confirm each observation timestamp.
urlscan.io ↗
Search existing URL analyses and inspect their requests and screenshots.
Limit: A new submission may become public and visit the target; avoid private URLs and tokens.
VirusTotal ↗
Inspect context for a domain, URL or known file hash.
Limit: Do not submit confidential files; verdicts may differ or be outdated.
No matching catalogue entry. Try another term or reset the filters.
These downloads contain tool descriptions and links, not provider search results. Retain limitations, references and review dates when reusing the catalogue.
Continue with the site’s detailed guides and data
Verify an online identityGuide or reference dataset →Verify a company and its directorsGuide or reference dataset →Verify an image or videoGuide or reference dataset →Map public digital infrastructureGuide or reference dataset →Build an OSINT timelineGuide or reference dataset →Compare source reliabilityGuide or reference dataset →
Questions about tools and external searches
Where are search results displayed?
On the selected provider’s website, in a new tab. IIS does not retrieve, host or display investigation results. Directory filters only filter the editorial catalogue.
Is the typed query stored?
The launchpad builds links inside your browser, without sending the query to IIS or storing it in browser storage. Clicking a prepared link sends the query to the named provider, under its own rules.
Are all tools free and available in every language?
No. Access may require an account, subscription, software or quota. The catalogue is available in French and English; providers set their interface languages, coverage and conditions.
Does no result prove that a fact is false?
No. Index coverage, spelling, language, access limits and capture dates can explain a missing result. Record what was searched and what remains unknown.