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 · 360 ms

HostCertsFirst seenLast seenDNS
oversee.biz 7 2026-04-17 2026-08-13 ok
*.oversee.biz 5 2025-08-31 2026-09-16 —
ovpn-2.oversee.biz 8 2026-04-08 2026-05-18 nxdomain
auth.oversee.biz 2 2026-09-01 2026-09-01 ok
ovpn.oversee.biz 5 2026-04-30 2026-08-29 ok
hello.oversee.biz 8 2026-05-12 2026-09-07 ok
webhooks.oversee.biz 1 2026-07-31 2026-07-31 ok
mta-sts.oversee.biz 2 2025-08-25 2026-07-26 ok
*.us.oversee.biz 4 2025-06-28 2026-09-12 —
auth.us.oversee.biz 6 2026-07-22 2026-09-19 ok
ovpn.us.oversee.biz 8 2026-04-09 2026-09-29 ok
trust.oversee.biz 10 2026-04-27 2026-08-23 ok
www.oversee.biz 12 2026-04-28 2026-08-24 ok
webhooks-sandbox.oversee.biz 1 2026-06-25 2026-06-25 ok

Programmatic access, with DNS A records: API GET /v1/hosts/oversee.biz (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/oversee.biz.