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.

9 hosts · 228 ms

HostCertsFirst seenLast seen
legal-aid.org 6 2025-11-18 2026-09-13
*.legal-aid.org 1 2025-11-18 2025-11-18
LASISE01.legal-aid.org 2 2025-09-25 2026-09-29
www.LASISE01.legal-aid.org 2 2025-09-25 2026-09-29
year-end-giving.legal-aid.org 5 2026-06-01 2026-09-29
cisionone-email.legal-aid.org 5 2026-06-05 2026-10-03
officewebapps.legal-aid.org 1 2025-08-08 2025-08-08
mta-sts.legal-aid.org 5 2026-05-30 2026-09-27
www.legal-aid.org 5 2026-05-16 2026-09-13

Programmatic access: API GET /v1/hosts/legal-aid.org (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/legal-aid.org.