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 · 183 ms

HostCertsFirst seenLast seen
myavista.com 2 2025-12-03 2025-12-03
*.myavista.com 2 2025-12-03 2025-12-03
outage.myavista.com 1 2026-05-10 2026-05-10
cloud.ask.myavista.com 3 2026-03-18 2026-08-19
image.ask.myavista.com 2 2026-04-27 2026-09-14
click.ask.myavista.com 4 2026-03-18 2026-08-19
view.ask.myavista.com 3 2026-03-18 2026-08-19
outagemo.myavista.com 1 2026-05-10 2026-05-10
outagemap.myavista.com 2 2025-11-24 2025-12-01
www.outagemap.myavista.com 2 2025-11-24 2025-12-01

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