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.

10 hosts · 236 ms

HostCertsFirst seenLast seenDNS
acrelianews.com 2 2025-10-12 2026-09-12 ok
*.acrelianews.com 5 2025-08-08 2026-08-20 —
soporte.acrelianews.com 10 2026-05-25 2026-09-22 ok
dev-spamcheck.acrelianews.com 1 2025-11-12 2025-11-12 ok
mail.acrelianews.com 3 2026-06-18 2026-08-18 ok
webmail.acrelianews.com 3 2026-06-18 2026-08-18 ok
dev-manager.acrelianews.com 1 2025-11-10 2025-11-10 ok
*.manager.acrelianews.com 3 2025-09-20 2026-08-20 —
dev.acrelianews.com 1 2025-11-10 2025-11-10 ok
www.acrelianews.com 2 2025-10-12 2026-09-12 ok

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