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.

22 hosts · 226 ms

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HostCertsFirst seenLast seen
efros.com 77 2026-04-21 2026-09-26
*.efros.com 27 2026-04-21 2026-09-26
email.lc.efros.com 5 2026-05-20 2026-09-17
nc.efros.com 21 2026-04-26 2026-09-14
rd.efros.com 16 2026-05-20 2026-07-18
service.efros.com 18 2026-05-16 2026-09-12
*.service.efros.com 8 2026-05-16 2026-09-11
dmarc-bridge.efros.com 18 2026-05-26 2026-09-22
blog.efros.com 16 2026-06-15 2026-10-16
link.efros.com 5 2026-04-23 2026-08-21
crm.efros.com 9 2026-05-20 2026-09-15
odoo.efros.com 16 2026-05-02 2026-08-28
app.efros.com 3 2026-06-25 2026-08-24
efros-so-ses.efros.com 4 2026-06-05 2026-06-05
links.efros.com 8 2026-05-20 2026-09-15
efros.efros.com 4 2026-06-05 2026-06-05
mta-sts.efros.com 7 2026-06-10 2026-10-03
status.efros.com 20 2026-04-25 2026-08-21
support.efros.com 1 2026-10-16 2026-10-16
test.efros.com 18 2026-05-16 2026-09-12
*.test.efros.com 6 2026-05-16 2026-09-11
www.efros.com 24 2026-04-23 2026-10-17

Programmatic access: API GET /v1/hosts/efros.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/efros.com.