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.

12 hosts · 365 ms

HostCertsFirst seenLast seenDNS
birdsandblooms.com 9 2026-05-23 2026-09-19 ok
*.birdsandblooms.com 8 2026-05-23 2026-09-19 —
capig.birdsandblooms.com 8 2026-05-05 2026-08-31 ok
sli.birdsandblooms.com 1 2025-12-14 2025-12-14 ok
ca.mail.birdsandblooms.com 4 2026-04-12 2026-08-10 ok
e.mail.birdsandblooms.com 4 2026-04-12 2026-08-10 ok
images.mail.birdsandblooms.com 2 2025-08-01 2026-07-02 ok
view.mail.birdsandblooms.com 2 2025-08-01 2026-07-02 ok
tachyon.birdsandblooms.com 3 2026-04-30 2026-08-15 ok
order.birdsandblooms.com 9 2025-06-25 2026-08-08 ok
bytes.birdsandblooms.com 4 2026-04-15 2026-09-02 ok
tollbit.birdsandblooms.com 33 2026-04-07 2026-09-18 ok

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