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.

5 hosts · 350 ms

HostCertsFirst seenLast seenDNS
akemona.online 12 2026-04-14 2026-09-15 ok
*.akemona.online 8 2026-04-14 2026-09-15 —
links.akemona.online 2 2026-09-11 2026-09-11 ok
mta-sts.akemona.online 3 2026-04-23 2026-09-23 ok
www.akemona.online 4 2026-04-14 2026-09-14 ok

Programmatic access, with DNS A records: API GET /v1/hosts/akemona.online (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/akemona.online.