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.

15 hosts · 483 ms

HostCertsFirst seenLast seenDNS
havenwellwithin.com 2 2025-08-21 2026-08-10 ok
l.e.havenwellwithin.com 8 2026-04-12 2026-08-08 ok
s.e.havenwellwithin.com 6 2026-05-04 2026-08-30 ok
w.e.havenwellwithin.com 8 2026-04-26 2026-08-22 ok
x.e.havenwellwithin.com 12 2026-05-24 2026-09-20 ok
share.havenwellwithin.com 5 2026-04-29 2026-08-25 ok
tlbhaventestsite.havenwellwithin.com 2 2025-08-21 2026-08-10 ok
staging.havenwellwithin.com 3 2025-07-23 2026-07-20 ok
clario.havenwellwithin.com 3 2026-10-01 2026-10-01 ok
smetrics.havenwellwithin.com 5 2025-09-21 2026-09-23 ok
tags.havenwellwithin.com 2 2026-08-27 2026-08-27 nodata
collect.havenwellwithin.com 2 2026-08-27 2026-08-27 nodata
development.havenwellwithin.com 2 2025-08-21 2026-08-10 ok
www.havenwellwithin.com 2 2025-08-21 2026-08-10 ok
erbhz.havenwellwithin.com 6 2026-04-30 2026-08-26 ok

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