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.

11 hosts · 223 ms

HostCertsFirst seenLast seenDNS
dorrus.com 21 2026-04-29 2026-10-04 ok
*.dorrus.com 16 2026-04-29 2026-10-04 —
osseja.dorrus.com 3 2026-04-13 2026-06-12 ok
staging.dorrus.com 5 2026-04-27 2026-08-25 ok
api-staging.dorrus.com 5 2026-04-27 2026-08-25 ok
api.dorrus.com 5 2026-05-08 2026-09-06 ok
carmen-api.dorrus.com 4 2026-06-07 2026-10-06 ok
carmen.dorrus.com 4 2026-06-08 2026-10-06 ok
tokenizer.dorrus.com 5 2026-05-10 2026-09-07 ok
dev.dorrus.com 5 2026-04-26 2026-08-25 ok
api-dev.dorrus.com 5 2026-04-26 2026-08-25 ok

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