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 · 471 ms

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HostCertsFirst seenLast seen
scottscheapflights.com 37 2026-03-25 2026-10-17
*.scottscheapflights.com 20 2026-03-25 2026-10-17
maintenance.scottscheapflights.com 1 2026-02-16 2026-02-16
storybook-email.scottscheapflights.com 1 2026-01-07 2026-01-07
shop.scottscheapflights.com 17 2026-04-30 2026-08-26
links.scottscheapflights.com 3 2025-10-28 2026-09-27
account.scottscheapflights.com 2 2025-08-25 2026-07-24

Programmatic access: API GET /v1/hosts/scottscheapflights.com (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/scottscheapflights.com.