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 · 242 ms

HostCertsFirst seenLast seenDNS
selfmed.net 5 2026-05-07 2026-09-04 ok
hub.selfmed.net 4 2026-04-11 2026-08-09 ok
gh.selfmed.net 1 2026-08-13 2026-08-13 ok
ai.selfmed.net 5 2026-05-06 2026-09-03 ok
chewie.ai.selfmed.net 5 2026-04-25 2026-08-23 ok
pai.selfmed.net 4 2026-04-11 2026-08-09 ok
bi.selfmed.net 1 2026-09-14 2026-09-14 ok
zam.selfmed.net 5 2026-05-01 2026-08-29 ok
n8n.selfmed.net 5 2026-05-06 2026-09-03 ok
docs.selfmed.net 4 2026-04-11 2026-08-09 ok
it.selfmed.net 5 2026-05-22 2026-09-19 ok
qdrant.selfmed.net 4 2026-04-14 2026-08-12 ok
www.selfmed.net 5 2026-05-07 2026-09-04 ok

Programmatic access, with DNS A records: API GET /v1/hosts/selfmed.net (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/selfmed.net.