Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

8 hosts · 164 ms

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HostCertsFirst seenLast seen
icicilombard.email 8 2026-05-02 2026-09-16
*.icicilombard.email 8 2026-05-02 2026-09-16
m1.custcomm.icicilombard.email 2 2026-01-06 2026-03-09
res1.custcomm.icicilombard.email 1 2026-03-09 2026-03-09
t1.custcomm.icicilombard.email 2 2026-01-06 2026-03-09
m1.info.icicilombard.email 2 2026-01-06 2026-03-09
res1.info.icicilombard.email 1 2026-03-09 2026-03-09
t1.info.icicilombard.email 2 2026-01-06 2026-03-09

Programmatic access: API GET /v1/hosts/icicilombard.email (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/icicilombard.email.