Find every subdomain
of a domain.

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

8 hosts · 258 ms

HostCertsFirst seenLast seenDNS
taimatitanium.com 5 2026-05-12 2026-09-09 ok
tracking.taimatitanium.com 5 2026-05-11 2026-08-11 ok
go.taimatitanium.com 4 2026-06-25 2026-08-23 ok
affiliates.taimatitanium.com 3 2026-05-17 2026-09-14 ok
visit.taimatitanium.com 7 2026-06-25 2026-08-23 ok
checkout.taimatitanium.com 2 2025-09-12 2026-08-13 ok
www.taimatitanium.com 13 2026-05-25 2026-10-04 ok
quiz.taimatitanium.com 6 2026-05-13 2026-09-08 ok

Programmatic access, with DNS A records: API GET /v1/hosts/taimatitanium.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/taimatitanium.com.