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.

10 hosts · 246 ms

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HostCertsFirst seenLast seen
optibet.lt 9 2026-05-12 2026-09-07
*.optibet.lt 9 2026-05-12 2026-09-07
sports-app.optibet.lt 13 2026-06-11 2026-10-08
poker.optibet.lt 6 2026-05-12 2026-09-07
*.poker.optibet.lt 6 2026-05-12 2026-09-07
apis.optibet.lt 3 2026-05-24 2026-09-08
mta-sts.optibet.lt 1 2026-02-04 2026-02-04
content.optibet.lt 13 2026-06-11 2026-10-07
int.optibet.lt 14 2026-04-29 2026-10-11
*.int.optibet.lt 14 2026-04-29 2026-10-11

Programmatic access: API GET /v1/hosts/optibet.lt (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/optibet.lt.