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.

7 hosts · 334 ms

HostCertsFirst seenLast seenDNS
janejewels.com 18 2025-10-10 2026-09-26 ok
concierge.janejewels.com 9 2026-04-18 2026-08-15 ok
sign.janejewels.com 3 2026-05-30 2026-08-14 ok
communications.janejewels.com 4 2026-07-05 2026-09-02 ok
returns.janejewels.com 6 2026-05-16 2026-09-11 ok
www.janejewels.com 14 2026-04-09 2026-09-23 ok
my.janejewels.com 15 2026-04-11 2026-09-22 ok

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