Domain & Network
Explore public-records and open-source research resources, organized by category. Each source lists its jurisdiction, coverage, and access requirements. Some resources require registration or payment. Use each resource according to its terms and applicable access rules.
Domain & Network
Infrastructure Search
| Source | Jurisdiction | Coverage | Access |
|---|---|---|---|
| Censys Search ↗ | Global | Hosts and certificates | Freemium |
| Shodan ↗ | Global | Internet-exposed devices and services | Freemium |
| URLScan.io ↗ | Global | Web page scans and DOM snapshots | Freemium |
Passive DNS & Certificates
| Source | Jurisdiction | Coverage | Access |
|---|---|---|---|
| crt.sh Certificate Transparency ↗ | Global | TLS certificate logs and subdomains | Free |
| DNSDumpster ↗ | Global | DNS recon mapping | Free |
| SecurityTrails ↗ | Global | Historical DNS and WHOIS | Freemium |
| VirusTotal ↗ | Global | URL/file/domain reputation, passive DNS | Freemium |
Web Archives
| Source | Jurisdiction | Coverage | Access |
|---|---|---|---|
| archive.today ↗ | Global | On-demand page snapshots | Free |
| Internet Archive Wayback Machine ↗ | Global | Historical web captures | Free |
WHOIS/RDAP
| Source | Jurisdiction | Coverage | Access |
|---|---|---|---|
| ARIN Whois/RDAP ↗ | North America | IP allocations and ASNs | Free |
| ICANN Lookup (RDAP) ↗ | Global | Domain registration data | Free |
| RIPE Database ↗ | Europe | IP allocations | Free |