Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

13 hosts · 197 ms

HostCertsFirst seenLast seen
amazingworkplace.com 3 2026-05-24 2026-08-22
staging2.amazingworkplace.com 2 2026-05-24 2026-05-24
stagingbig.amazingworkplace.com 3 2026-05-24 2026-08-24
landing.amazingworkplace.com 2 2026-05-04 2026-10-04
staging.amazingworkplace.com 2 2026-05-24 2026-05-24
api.amazingworkplace.com 2 2026-04-12 2026-09-12
demo.amazingworkplace.com 2 2025-07-23 2026-06-23
certifications.amazingworkplace.com 2 2026-05-04 2026-10-04
demos.amazingworkplace.com 11 2026-05-25 2026-09-21
assets.amazingworkplace.com 2 2025-08-06 2026-07-07
surveys.amazingworkplace.com 2 2026-05-04 2026-10-04
eu.amazingworkplace.com 3 2026-05-24 2026-09-27
www.amazingworkplace.com 3 2026-05-24 2026-08-22

Programmatic access: API GET /v1/hosts/amazingworkplace.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/amazingworkplace.com.