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.

8 hosts · 301 ms

HostCertsFirst seenLast seenDNS
pekauto.com 5 2026-04-19 2026-08-17 ok
*.pekauto.com 5 2026-04-19 2026-08-17 —
test.rwave.pekauto.com 5 2026-05-10 2026-09-07 nodata
archive.prm.pekauto.com 5 2026-04-22 2026-08-20 nodata
chat.prm.pekauto.com 4 2026-06-09 2026-10-07 ok
test.prm.pekauto.com 5 2026-05-26 2026-09-23 nodata
gitlaberp.pekauto.com 1 2026-04-15 2026-04-15 ok
zabbix.pekauto.com 4 2026-04-18 2026-08-16 nodata

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