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.

11 hosts · 318 ms

HostCertsFirst seenLast seenDNS
atherenergy.com 17 2025-11-12 2026-08-16 ok
*.atherenergy.com 17 2025-11-12 2026-08-16 —
media.atherenergy.com 1 2026-01-05 2026-01-05 ok
readme.atherenergy.com 1 2025-11-15 2025-11-15 nodata
link.atherenergy.com 11 2026-04-27 2026-10-03 ok
internal.atherenergy.com 3 2026-05-01 2026-08-16 ok
shop.atherenergy.com 15 2026-04-10 2026-09-21 ok
assets.atherenergy.com 3 2025-12-31 2026-07-12 ok
assests.atherenergy.com 1 2025-12-16 2025-12-16 ok
itsupport.atherenergy.com 10 2026-05-09 2026-09-04 ok
assist.atherenergy.com 41 2026-05-29 2026-10-03 ok

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