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.

23 hosts · 327 ms

HostCertsFirst seenLast seenDNS
zivver.com 17 2026-02-16 2026-10-07 ok
*.zivver.com 26 2025-10-16 2026-10-07 —
sign-ipv4.zivver.com 1 2026-05-20 2026-05-20 ok
app-ipv4.zivver.com 2 2025-10-06 2026-09-06 ok
owa-v6.zivver.com 6 2025-10-13 2026-09-16 ok
owa-v7.zivver.com 4 2026-02-20 2026-07-23 ok
owa.zivver.com 1 2026-02-02 2026-02-02 ok
brand.zivver.com 5 2026-05-14 2026-09-12 ok
owa.eu.prd.zivver.com 2 2025-10-08 2025-10-08 nodata
info.email.zivver.com 5 2026-05-13 2026-09-13 ok
sign.zivver.com 1 2026-05-20 2026-05-20 ok
app.zivver.com 2 2025-10-06 2026-09-06 ok
collector.zivver.com 2 2026-04-13 2026-09-13 ok
docs.zivver.com 1 2026-02-02 2026-02-02 ok
downloads.zivver.com 1 2026-02-16 2026-02-16 ok
mta-sts.zivver.com 2 2025-07-31 2026-07-01 ok
get.zivver.com 10 2026-04-19 2026-08-20 ok
support.zivver.com 1 2026-02-19 2026-02-19 ok
www.support.zivver.com 1 2026-02-19 2026-02-19 nxdomain
downloads-test.zivver.com 3 2025-10-29 2026-09-29 ok
app.eu.zivver.com 3 2025-10-06 2026-09-06 ok
www.zivver.com 8 2026-04-19 2026-08-15 ok
security.zivver.com 15 2026-04-26 2026-08-28 ok

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