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.

6 hosts · 292 ms

HostCertsFirst seenLast seenDNS
absitequest.com 5 2026-06-04 2026-09-17 ok
instagram.absitequest.com 3 2025-09-16 2026-07-28 ok
review.absitequest.com 8 2026-04-25 2026-09-29 ok
www.absitequest.com 5 2026-05-29 2026-09-11 ok
pay.absitequest.com 2 2025-06-26 2026-06-27 ok
www.pay.absitequest.com 2 2025-06-26 2026-06-27 nxdomain

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