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.

13 hosts · 312 ms

HostCertsFirst seenLast seenDNS
earls.ca 34 2025-11-07 2026-10-02 ok
*.earls.ca 19 2025-11-07 2026-08-27 —
iwd2020.earls.ca 5 2026-05-31 2026-09-28 ok
wpdev12026.earls.ca 8 2026-05-27 2026-07-25 nxdomain
www.wpdev12026.earls.ca 16 2026-05-27 2026-07-25 ok
assent-api.earls.ca 3 2026-05-07 2026-08-28 ok
ec-tools.earls.ca 6 2026-04-18 2026-09-24 ok
staging.ec-tools.earls.ca 1 2026-04-17 2026-04-17 nxdomain
mta-sts.earls.ca 2 2026-03-06 2026-07-22 ok
assent.earls.ca 3 2026-05-12 2026-08-31 ok
staging-api.assent.earls.ca 3 2026-05-11 2026-09-12 ok
www.earls.ca 17 2026-06-06 2026-10-02 ok
pay.earls.ca 4 2026-04-16 2026-08-14 ok

Programmatic access, with DNS A records: API GET /v1/hosts/earls.ca (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/earls.ca.