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.

9 hosts · 364 ms

HostCertsFirst seenLast seenDNS
metlife.hu 5 2025-12-12 2026-09-11 ok
metscan.metlife.hu 1 2025-10-02 2025-10-02 ok
qa.ssologin.metlife.hu 1 2025-12-10 2025-12-10 ok
mymetlife-ping.test.metlife.hu 38 2026-02-04 2026-09-29 nxdomain
external-map-ping.test.metlife.hu 11 2026-02-19 2026-09-29 nxdomain
www.metlife.hu 8 2025-07-22 2026-09-08 ok
greenap.www.metlife.hu 2 2025-10-14 2025-10-14 nxdomain
greenus.www.metlife.hu 2 2025-10-14 2025-10-14 nxdomain
my.metlife.hu 12 2025-07-15 2026-08-07 ok

Programmatic access, with DNS A records: API GET /v1/hosts/metlife.hu (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/metlife.hu.