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.

14 hosts · 357 ms

HostCertsFirst seenLast seenDNS
netzero.energy 4 2026-01-08 2026-09-18 ok
ocpp1.netzero.energy 3 2025-10-15 2026-09-15 ok
ocpp2.netzero.energy 3 2025-10-15 2026-09-15 ok
ocpp3.netzero.energy 3 2025-10-15 2026-09-15 ok
download.netzero.energy 1 2026-02-05 2026-02-05 ok
metabase.netzero.energy 1 2026-01-23 2026-01-23 ok
api.netzero.energy 2 2026-04-18 2026-09-18 ok
cdn.netzero.energy 2 2025-07-01 2026-06-01 ok
app.netzero.energy 2 2026-04-18 2026-09-18 ok
ocpp.netzero.energy 3 2025-10-15 2026-09-15 ok
docs.netzero.energy 5 2026-05-25 2026-09-23 ok
status.netzero.energy 5 2026-06-02 2026-09-30 ok
www.netzero.energy 2 2026-04-18 2026-09-18 ok
pay.netzero.energy 12 2026-05-25 2026-09-20 ok

Programmatic access, with DNS A records: API GET /v1/hosts/netzero.energy (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/netzero.energy.