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.

10 hosts · 329 ms

HostCertsFirst seenLast seenDNS
mnr.org 15 2025-12-12 2026-08-12 ok
*.mnr.org 15 2025-12-12 2026-08-12 —
eamstg.mnr.org 8 2026-06-03 2026-10-01 ok
eam.mnr.org 7 2026-04-17 2026-09-09 ok
mnream.mnr.org 7 2026-04-17 2026-09-09 ok
autodiscover.mnr.org 1 2025-08-12 2025-08-12 ok
mnrgroupreservations.mnr.org 6 2026-05-14 2026-09-09 ok
tview-test.mnr.org 3 2026-04-13 2026-08-25 ok
eamdev.mnr.org 8 2026-06-03 2026-10-01 ok
www.mnr.org 5 2026-06-11 2026-09-09 ok

Programmatic access, with DNS A records: API GET /v1/hosts/mnr.org (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/mnr.org.