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 · 248 ms

HostCertsFirst seenLast seenDNS
gfmgivingfund.org 4 2026-04-15 2026-08-17 ok
ablink.give.gfmgivingfund.org 2 2026-02-24 2026-07-12 ok
ablink.account.gfmgivingfund.org 2 2026-02-24 2026-07-12 ok
support.gfmgivingfund.org 5 2026-05-02 2026-08-30 ok
www.gfmgivingfund.org 4 2026-04-15 2026-08-17 ok

Programmatic access, with DNS A records: API GET /v1/hosts/gfmgivingfund.org (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/gfmgivingfund.org.