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.

14 hosts · 307 ms

HostCertsFirst seenLast seenDNS
plantnet.org 6 2025-09-24 2026-09-01 ok
*.plantnet.org 6 2025-09-24 2026-09-01 —
donate.plantnet.org 1 2026-09-11 2026-09-11 ok
gbif.plantnet.org 1 2026-09-11 2026-09-11 ok
mail.plantnet.org 5 2026-04-16 2026-07-29 ok
eye.mail.plantnet.org 7 2026-04-16 2026-10-01 ok
img.mail.plantnet.org 7 2026-04-16 2026-10-01 ok
click.mail.plantnet.org 7 2026-04-19 2026-10-04 ok
landings.mail.plantnet.org 7 2026-04-16 2026-10-01 ok
forms.mail.plantnet.org 7 2026-04-16 2026-10-01 ok
planttaxomatcher.plantnet.org 1 2026-09-08 2026-09-08 ok
docs.plantnet.org 4 2026-04-08 2026-08-06 ok
flags.plantnet.org 1 2026-09-09 2026-09-09 ok
ai-taxonomist.plantnet.org 5 2026-04-25 2026-08-23 ok

Programmatic access, with DNS A records: API GET /v1/hosts/plantnet.org (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/plantnet.org.