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.

19 hosts · 515 ms

HostCertsFirst seenLast seenDNS
thebomb.ca 29 2026-05-12 2026-09-22 ok
*.thebomb.ca 17 2026-05-15 2026-09-10 —
mx2.thebomb.ca 2 2026-08-24 2026-08-24 ok
media.thebomb.ca 2 2025-06-09 2026-05-10 ok
a1machine.thebomb.ca 6 2026-05-02 2026-08-28 ok
lifeseasonscounselling.thebomb.ca 6 2026-04-30 2026-08-26 ok
i.thebomb.ca 12 2026-04-14 2026-08-10 ok
ai.thebomb.ca 10 2026-05-27 2026-09-22 nxdomain
fk.thebomb.ca 2 2026-09-02 2026-09-02 ok
m.thebomb.ca 6 2026-04-14 2026-08-10 ok
n8n.thebomb.ca 4 2026-04-10 2026-08-08 ok
cdn.thebomb.ca 5 2026-07-23 2026-09-20 ok
newsletter.thebomb.ca 4 2026-05-26 2026-07-25 ok
isaacdavis.thebomb.ca 10 2026-04-25 2026-08-21 ok
email-assets.thebomb.ca 2 2026-09-25 2026-09-25 ok
mx.thebomb.ca 2 2026-08-04 2026-08-24 ok
pagely.thebomb.ca 3 2026-09-15 2026-09-15 ok
my.thebomb.ca 4 2026-04-07 2026-09-17 ok
postiz.thebomb.ca 2 2026-06-29 2026-06-29 nxdomain

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