Domain History Graph

Registration, DNS, hosting networks, certificates and Wayback captures of a domain as a timeline.

Try an example: example.com from pasted RDAP + CDX

How it works

Combines public records about a domain: RDAP registration data (registrar, registration/expiry/last-changed dates, status, name servers, DNSSEC), current A/AAAA/NS/MX records and the networks (ASNs) hosting its addresses via RIPEstat, Certificate Transparency history from crt.sh and first/last Wayback Machine captures. Shows a timeline and a relationship graph. Contact names, e-mails and phone numbers are never displayed.

RDAP (RFC 9083) via the rdap.org bootstrap redirector, which forwards to the authoritative registry/registrar RDAP server. Only registrar, dates, status, name servers, DNSSEC and — if published — the registrant organisation and country are shown; contact names, e-mails, phone numbers and street addresses are dropped and only counted.
Current DNS (A, AAAA, NS, MX) from this server's resolver; hosting network per public address via RIPEstat network-info (origin ASN + prefix) and as-overview (holder name).
Certificate Transparency: crt.sh JSON for the exact domain, deduplicated by serial: first certificate seen, latest issuance, issuing organisations, distinct names.
Wayback Machine CDX API: the 10 oldest and 10 newest captures (fl=timestamp,statuscode,digest); digest changes between samples indicate content changes. Totals across all captures are not computed (the index is too large to count cheaply).
Paste mode uses the RDAP "last update of RDAP database" event as the reference time for age/expiry so results do not depend on when you run it.

For scripts and AI agents

JSON API: POST https://domainhistorygraph.usefulweb.site/api/v1/calculate (same calculation as this page)
Interface description: OpenAPI 3.1 · AI guide: llms.txt
MCP server (Streamable HTTP): https://domainhistorygraph.usefulweb.site/mcp · tool name domain_history_graph

Example request

curl -s -X POST https://domainhistorygraph.usefulweb.site/api/v1/calculate \
  -H 'content-type: application/json' \
  -d '{…see OpenAPI examples…}'

Related tools

DNS + Certificate Explorer – DNS records, e-mail security, CAA, live TLS certificate and CT history for a domain.
E-mail Infrastructure Explorer – MX, SPF lookups, DMARC, DKIM, MTA-STS, TLS-RPT and BIMI for a domain, scored with fixes.
Internet Outage Atlas – Correlate public outage signals (IODA, RIPEstat BGP, live probe) for a country, ASN or domain.