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.

18 hosts · 352 ms

HostCertsFirst seenLast seenDNS
giglio.com 5 2026-03-26 2026-08-12 ok
*.giglio.com 7 2026-03-26 2026-09-29 —
www3.giglio.com 2 2025-11-05 2026-10-06 ok
media.giglio.com 7 2025-09-14 2026-09-01 ok
giuseppe.giglio.com 5 2026-05-23 2026-09-20 ok
img.giglio.com 5 2025-09-07 2026-09-18 ok
whistleblowing.giglio.com 3 2026-05-29 2026-08-13 ok
media-catalog.giglio.com 9 2025-10-09 2026-10-02 ok
pi.giglio.com 3 2026-05-22 2026-09-09 ok
l.giglio.com 4 2026-06-07 2026-10-05 ok
datastream.giglio.com 3 2026-06-16 2026-08-24 ok
media-render-origin.giglio.com 2 2026-10-02 2026-10-02 nxdomain
catalog-assets-origin.giglio.com 2 2026-10-02 2026-10-02 ok
faq.giglio.com 5 2026-05-07 2026-09-04 ok
careers.giglio.com 6 2026-06-04 2026-08-03 nxdomain
static-assets.giglio.com 2 2025-09-07 2026-08-08 ok
catalog-assets.giglio.com 1 2026-10-02 2026-10-02 nodata
phplist.giglio.com 1 2026-08-27 2026-08-27 ok

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