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.

13 hosts · 359 ms

HostCertsFirst seenLast seenDNS
michele.com 9 2026-05-30 2026-09-25 ok
*.michele.com 9 2026-05-30 2026-09-25 —
prod.michele.com 17 2026-05-15 2026-09-25 ok
*.prod.michele.com 8 2026-05-30 2026-09-25 —
staging.michele.com 10 2026-05-20 2026-09-15 ok
yogi-staging.michele.com 20 2026-06-03 2026-09-30 ok
mi.michele.com 3 2025-11-02 2026-10-03 ok
gtm.michele.com 4 2026-05-26 2026-09-13 ok
stores.michele.com 2 2026-09-02 2026-09-02 ok
dev.michele.com 27 2026-05-01 2026-09-22 ok
yogi-dev.michele.com 14 2026-05-19 2026-09-14 ok
*.dev.michele.com 10 2026-05-27 2026-09-22 —
www.michele.com 8 2026-05-16 2026-09-11 ok

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