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.

8 hosts · 335 ms

HostCertsFirst seenLast seenDNS
ascensionpoint.com 23 2025-12-31 2026-09-05 ok
*.ascensionpoint.com 3 2025-12-31 2026-08-25 —
link.ascensionpoint.com 5 2026-05-17 2026-09-14 ok
portal.ascensionpoint.com 2 2026-04-05 2026-09-05 ok
mail.ascensionpoint.com 3 2025-09-26 2026-09-25 ok
download.mail.ascensionpoint.com 3 2025-09-26 2026-09-25 ok
autodiscover.ascensionpoint.com 3 2025-09-26 2026-09-25 ok
www.ascensionpoint.com 21 2026-05-12 2026-09-07 ok

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