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.

10 hosts · 294 ms

Download CSV
HostCertsFirst seenLast seen
sercotel.com 16 2025-10-20 2026-09-15
*.sercotel.com 6 2025-12-25 2026-09-15
data-integration.sercotel.com 1 2026-03-12 2026-03-12
s.sercotel.com 4 2026-06-16 2026-10-14
otas.sercotel.com 7 2026-05-21 2026-09-18
cloud.news.sercotel.com 2 2025-09-20 2026-07-14
image.news.sercotel.com 4 2026-05-13 2026-10-13
click.news.sercotel.com 2 2025-09-20 2026-07-13
view.news.sercotel.com 1 2026-06-04 2026-06-04
www.sercotel.com 11 2025-10-20 2026-08-29

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