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.

20 hosts · 429 ms

HostCertsFirst seenLast seenDNS
affirm.ca 14 2026-02-21 2026-10-06 ok
*.affirm.ca 14 2026-02-21 2026-10-06 —
url4324.affirm.ca 4 2026-05-14 2026-07-29 ok
businesshub.affirm.ca 6 2026-06-02 2026-10-05 ok
cloud.e.affirm.ca 1 2026-01-27 2026-01-27 ok
image.e.affirm.ca 3 2026-02-14 2026-09-29 ok
click.e.affirm.ca 1 2026-01-21 2026-01-21 ok
view.e.affirm.ca 1 2026-01-21 2026-01-21 ok
catestpartner001-jwe.affirm.ca 2 2026-04-28 2026-04-28 nxdomain
aiagentpocrs256-jwe.affirm.ca 2 2026-07-29 2026-07-29 nxdomain
aiagentpoc-jwe.affirm.ca 2 2026-07-29 2026-07-29 nxdomain
d9jiuy576yqf36ny-jwe.affirm.ca 4 2026-07-22 2026-07-22 nxdomain
url4324shop.affirm.ca 1 2025-11-27 2025-11-27 ok
helpcenter.affirm.ca 3 2025-08-13 2026-08-26 ok
catestpartner001-jws.affirm.ca 2 2026-04-28 2026-04-28 nxdomain
aiagentpocrs256-jws.affirm.ca 2 2026-07-29 2026-07-29 nxdomain
aiagentpoc-jws.affirm.ca 2 2026-07-29 2026-07-29 nxdomain
d9jiuy576yqf36ny-jws.affirm.ca 4 2026-07-22 2026-07-22 nxdomain
sandbox.affirm.ca 13 2026-02-26 2026-09-30 ok
*.sandbox.affirm.ca 13 2026-02-26 2026-09-30 —

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