Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

7 hosts · 256 ms

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HostCertsFirst seenLast seen
scrapfly.io 6 2026-05-20 2026-09-17
*.scrapfly.io 6 2026-05-20 2026-09-17
c.scrapfly.io 16 2026-04-28 2026-08-24
*.workspace.scrapfly.io 6 2026-05-20 2026-09-17
cdn.scrapfly.io 5 2026-06-03 2026-09-26
tools.scrapfly.io 3 2026-05-25 2026-08-23
*.tools.scrapfly.io 11 2026-05-20 2026-09-17

Programmatic access: API GET /v1/hosts/scrapfly.io (API key for paging).

Shown here: hostnames with a certificate that is valid now or expired within the last 90 days. The full history since 2013 — hostnames whose last certificate expired earlier — is a Pro plan method: GET /v1/hosts-history/scrapfly.io.