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.

9 hosts · 341 ms

HostCertsFirst seenLast seenDNS
meh.com 3 2025-12-22 2026-07-03 ok
*.meh.com 1 2025-12-22 2025-12-22 —
static.meh.com 1 2026-07-02 2026-07-02 ok
api.meh.com 2 2026-03-09 2026-07-02 ok
trk.meh.com 2 2025-08-15 2026-07-15 ok
shop.meh.com 8 2026-04-22 2026-09-19 ok
tagmanager.meh.com 4 2026-04-22 2026-09-09 ok
shoddygoods.meh.com 10 2026-04-27 2026-08-23 ok
www.meh.com 2 2026-03-09 2026-07-02 ok

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