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.

20 hosts · 276 ms

HostCertsFirst seenLast seen
stengerlaw.com 20 2026-01-30 2026-10-06
*.stengerlaw.com 10 2026-01-30 2026-09-29
app1.stengerlaw.com 3 2025-07-16 2026-07-17
www.app1.stengerlaw.com 3 2025-07-16 2026-07-17
bc.stengerlaw.com 1 2025-12-27 2025-12-27
www.bc.stengerlaw.com 1 2025-12-27 2025-12-27
api.stengerlaw.com 2 2026-08-25 2026-08-25
sl.stengerlaw.com 2 2026-10-06 2026-10-06
*.sl.stengerlaw.com 2 2026-10-06 2026-10-06
vpn.stengerlaw.com 1 2025-12-09 2025-12-09
www.vpn.stengerlaw.com 1 2025-12-09 2025-12-09
url9679.consumer.stengerlaw.com 2 2026-09-11 2026-09-11
dvr.stengerlaw.com 2 2026-04-22 2026-10-06
www.dvr.stengerlaw.com 2 2026-04-22 2026-10-06
url2722.notifications.stengerlaw.com 2 2026-09-10 2026-09-10
advart.stengerlaw.com 6 2025-09-01 2026-09-15
www.advart.stengerlaw.com 6 2025-09-01 2026-09-15
www.stengerlaw.com 8 2026-04-29 2026-09-17
pbx.stengerlaw.com 5 2025-07-01 2026-07-15
www.pbx.stengerlaw.com 5 2025-07-01 2026-07-15

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