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.

25 hosts · 356 ms

HostCertsFirst seenLast seenDNS
civiqs.com 1 2026-05-07 2026-05-07 ok
52884512.civiqs.com 2 2025-07-15 2026-06-15 ok
52884493.civiqs.com 2 2025-07-15 2026-06-15 ok
49224135.civiqs.com 1 2025-11-06 2025-11-06 ok
47929716.civiqs.com 1 2025-11-06 2025-11-06 ok
dashboard.civiqs.com 1 2026-05-07 2026-05-07 ok
cdn.polling.civiqs.com 2 2025-07-29 2026-06-29 ok
routing.civiqs.com 1 2026-05-07 2026-05-07 ok
api.civiqs.com 1 2026-05-07 2026-05-07 ok
admin-api.civiqs.com 1 2026-05-07 2026-05-07 ok
results-api.civiqs.com 1 2026-05-07 2026-05-07 ok
resultsemail.civiqs.com 1 2025-11-06 2025-11-06 ok
admin.civiqs.com 2 2026-05-07 2026-09-15 ok
embeds.civiqs.com 2 2026-09-15 2026-09-15 nxdomain
cdn.embeds.civiqs.com 2 2026-09-15 2026-09-15 nxdomain
results.embeds.civiqs.com 2 2025-06-18 2026-05-19 ok
cdn.frontends.civiqs.com 1 2026-01-28 2026-01-28 ok
cdn.error-pages.civiqs.com 2 2025-07-29 2026-06-29 ok
newsletterlinks.civiqs.com 2 2025-07-15 2026-06-15 ok
stagingnewsletters.civiqs.com 2 2025-07-15 2026-06-15 ok
cdn.assets.civiqs.com 1 2026-02-18 2026-02-18 ok
production-model-results.civiqs.com 2 2025-06-18 2026-05-19 ok
cdn.documents.civiqs.com 1 2026-02-18 2026-02-18 ok
resultsemaildev.civiqs.com 1 2025-11-06 2025-11-06 ok
www.civiqs.com 1 2026-05-07 2026-05-07 ok

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