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.

15 hosts · 500 ms

HostCertsFirst seenLast seenDNS
oneday.agency 24 2026-05-15 2026-09-28 ok
*.oneday.agency 24 2026-05-15 2026-09-28 —
creativehub.oneday.agency 10 2026-04-30 2026-08-26 ok
dashboard.oneday.agency 6 2026-06-12 2026-08-10 ok
crm.oneday.agency 9 2026-06-04 2026-09-30 ok
tracker.oneday.agency 10 2026-04-21 2026-08-17 ok
planner.oneday.agency 11 2026-04-23 2026-08-20 ok
copper.oneday.agency 10 2026-05-02 2026-08-29 ok
parser.oneday.agency 6 2026-06-12 2026-08-10 ok
importer.oneday.agency 6 2026-04-28 2026-08-24 ok
hr.oneday.agency 10 2026-05-12 2026-09-07 ok
es.oneday.agency 1 2026-09-01 2026-09-01 ok
www.es.oneday.agency 1 2026-09-01 2026-09-01 ok
payment.oneday.agency 2 2026-04-15 2026-04-15 ok
matrix.oneday.agency 7 2026-05-19 2026-09-14 ok

Programmatic access, with DNS A records: API GET /v1/hosts/oneday.agency (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/oneday.agency.