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.

18 hosts · 332 ms

HostCertsFirst seenLast seenDNS
burinka.cz 4 2025-08-25 2026-07-26 ok
vmwuag01.burinka.cz 1 2026-02-11 2026-02-11 ok
vmwidm01.burinka.cz 1 2026-02-16 2026-02-16 ok
iawmdm01.burinka.cz 2 2026-04-10 2026-10-06 ok
mx01.burinka.cz 1 2026-01-03 2026-01-03 ok
mx02.burinka.cz 1 2026-01-03 2026-01-03 ok
vpn2.burinka.cz 1 2026-01-09 2026-01-09 ok
jira.burinka.cz 1 2026-05-06 2026-05-06 nodata
online.burinka.cz 5 2026-05-31 2026-09-28 ok
formulare.burinka.cz 2 2026-05-08 2026-05-08 ok
api.burinka.cz 3 2026-06-29 2026-08-28 ok
gql.burinka.cz 3 2026-04-29 2026-09-29 ok
sgtm.burinka.cz 3 2026-05-07 2026-08-25 ok
vpn.burinka.cz 1 2026-01-09 2026-01-09 ok
qr.burinka.cz 2 2025-10-06 2026-10-05 ok
jira-test.burinka.cz 1 2026-04-10 2026-04-10 nodata
www.burinka.cz 5 2025-08-25 2026-08-25 ok
gateway.burinka.cz 1 2025-07-01 2025-07-01 ok

Programmatic access, with DNS A records: API GET /v1/hosts/burinka.cz (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/burinka.cz.