Domain lifecycle
Registration, registrar, creation and expiry dates, status locks, nameservers, and DNSSEC delegation.
No paid lookup API · No report stored server-side
Domain · DNS · Network · Email
Know exactly what powers—and protects—your domain.
Inspect registration and expiry, DNS records and propagation, visible hosting infrastructure, SPF, DMARC, DKIM, BIMI, MTA-STS, TLS reporting, and DANE in one evidence-based report.
RDAP + WHOIS lifecycle data Multi-resolver DNS comparison Advanced email authentication
DNS intelligence
A, AAAA, CNAME, MX, TXT, NS, SOA, CAA, DS, DNSKEY, nameserver health, and resolver comparison.
Hosting and network clues
Public IPs, reverse DNS, ASN, allocation registry, CDN, platform, and origin-obscuring warnings.
Email authentication
MX provider detection, recursive SPF analysis, DMARC enforcement, DKIM key strength, BIMI, MTA-STS, and TLS-RPT.
Evidence over guesses
A domain checker built for decisions, not screenshots.
Many lookup tools show one record at a time. Rex connects registration lifecycle, DNS delegation, visible network ownership, mail routing, sender authentication, reporting, and SMTP TLS policies into a single prioritized report. Every provider result is labeled as a clue with confidence because CDNs, gateways, privacy controls, and registry restrictions can hide the underlying system.
What this tool deliberately does not claim
- • Domain age is not presented as a Google ranking advantage.
- • A CDN is not automatically labeled as the origin hosting provider.
- • Auto-discovered DKIM selectors are not treated as a complete inventory.
- • A passing record check is not a guarantee of inbox placement or legal compliance.