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.

6 hosts · 238 ms

HostCertsFirst seenLast seen
energyandcapital.com 11 2025-09-17 2026-10-06
*.energyandcapital.com 4 2025-09-17 2026-10-06
site2.energyandcapital.com 2 2026-03-29 2026-08-29
w337.energyandcapital.com 1 2025-12-18 2025-12-18
sli.energyandcapital.com 2 2025-09-14 2026-08-15
www.energyandcapital.com 7 2026-03-29 2026-09-17

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