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 · 334 ms

HostCertsFirst seenLast seenDNS
accolad.com 24 2026-04-21 2026-10-02 ok
*.accolad.com 6 2026-04-21 2026-08-22 —
wsib.accolad.com 15 2026-06-05 2026-10-01 ok
app-backend.accolad.com 4 2026-04-19 2026-08-17 ok
sondage.accolad.com 8 2026-05-05 2026-09-01 ok
compte.accolad.com 13 2026-04-13 2026-09-23 ok
billing.accolad.com 4 2026-07-08 2026-09-05 ok
humi.accolad.com 21 2026-04-10 2026-10-04 ok
stl.accolad.com 5 2026-05-07 2026-09-22 ok
app.accolad.com 3 2026-06-29 2026-08-30 ok
support.accolad.com 9 2026-06-02 2026-09-28 ok
www.accolad.com 11 2026-04-12 2026-09-23 ok

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