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.

20 hosts · 241 ms

HostCertsFirst seenLast seen
scribbr.com 21 2026-05-11 2026-09-19
*.scribbr.com 16 2026-05-11 2026-09-17
cdn2.scribbr.com 3 2025-09-18 2026-08-18
techademia.scribbr.com 5 2026-05-23 2026-09-22
qa.scribbr.com 5 2026-05-23 2026-09-20
support-kb.scribbr.com 2 2026-03-16 2026-09-15
www.support-kb.scribbr.com 1 2026-03-16 2026-03-16
staging.scribbr.com 1 2025-12-30 2025-12-30
techademia-staging.scribbr.com 5 2026-05-23 2026-09-22
redash.scribbr.com 3 2026-06-04 2026-09-04
cdn.scribbr.com 8 2025-09-18 2026-09-19
qa-cdn.scribbr.com 5 2026-05-23 2026-09-20
vpn.scribbr.com 5 2026-05-06 2026-09-04
help.scribbr.com 5 2026-05-27 2026-09-24
editor.scribbr.com 5 2026-05-22 2026-09-19
qa-editor.scribbr.com 5 2026-05-23 2026-09-20
*.cgs.scribbr.com 15 2026-04-22 2026-10-11
academic-assistant.scribbr.com 5 2026-05-20 2026-09-17
quillbot.scribbr.com 18 2026-05-09 2026-09-04
www.scribbr.com 5 2026-05-22 2026-09-19

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