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.

12 hosts · 284 ms

HostCertsFirst seenLast seenDNS
globaloring.com 12 2026-04-14 2026-09-15 ok
*.globaloring.com 8 2026-04-14 2026-09-15 —
pulse.globaloring.com 4 2026-04-11 2026-08-14 ok
marketing.globaloring.com 1 2026-09-18 2026-09-18 ok
atlas.globaloring.com 4 2026-05-23 2026-07-22 nxdomain
docs.globaloring.com 5 2026-05-18 2026-09-17 ok
leads.globaloring.com 5 2026-05-17 2026-09-20 ok
tools.globaloring.com 4 2026-06-06 2026-10-07 ok
intranet.globaloring.com 5 2026-04-14 2026-09-26 ok
agent.globaloring.com 4 2026-05-01 2026-07-01 nxdomain
www.globaloring.com 4 2026-04-17 2026-08-15 ok
mror-az.globaloring.com 10 2026-05-28 2026-09-24 ok

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