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.

36 hosts · 302 ms

HostCertsFirst seenLast seenDNS
apartmentguide.com 14 2025-11-14 2026-08-21 ok
*.apartmentguide.com 10 2025-11-14 2026-08-21 —
qa.apartmentguide.com 17 2025-10-26 2026-10-01 ok
*.qa.apartmentguide.com 6 2025-10-26 2026-09-26 —
zncnwv.qa.apartmentguide.com 3 2026-05-19 2026-10-06 ok
www.qa.apartmentguide.com 4 2026-04-13 2026-07-16 ok
prod.apartmentguide.com 1 2025-11-14 2025-11-14 ok
*.prod.apartmentguide.com 1 2025-11-14 2025-11-14 —
mpglie.apartmentguide.com 5 2026-05-28 2026-10-02 ok
release.apartmentguide.com 13 2025-10-26 2026-10-01 ok
*.release.apartmentguide.com 3 2025-10-26 2026-09-26 —
ci.apartmentguide.com 13 2025-11-13 2026-10-01 ok
*.ci.apartmentguide.com 4 2025-11-13 2026-08-21 —
cae.ci.apartmentguide.com 11 2025-11-13 2026-10-01 ok
*.cae.ci.apartmentguide.com 1 2025-11-13 2025-11-13 —
blog.ci.apartmentguide.com 2 2026-04-17 2026-04-17 ok
api.ci.apartmentguide.com 11 2025-11-13 2026-10-01 ok
*.api.ci.apartmentguide.com 1 2025-11-13 2025-11-13 —
www.ci.apartmentguide.com 2 2026-07-16 2026-07-16 ok
api.apartmentguide.com 1 2025-11-14 2025-11-14 ok
*.api.apartmentguide.com 1 2025-11-14 2025-11-14 —
trunk.apartmentguide.com 11 2025-11-13 2026-10-01 ok
*.trunk.apartmentguide.com 1 2025-11-13 2025-11-13 —
r.apartmentguide.com 11 2025-11-13 2026-10-01 ok
*.r.apartmentguide.com 4 2025-11-13 2026-08-21 —
qa.assets.apartmentguide.com 13 2025-10-26 2026-10-01 ok
*.qa.assets.apartmentguide.com 3 2025-10-26 2026-09-26 —
ci.assets.apartmentguide.com 11 2025-11-13 2026-10-01 ok
*.ci.assets.apartmentguide.com 1 2025-11-13 2025-11-13 —
development.apartmentguide.com 11 2025-11-13 2026-10-01 ok
*.development.apartmentguide.com 1 2025-11-13 2025-11-13 —
www.apartmentguide.com 4 2026-04-20 2026-07-16 ok
image.message.my.apartmentguide.com 3 2025-09-13 2026-08-17 ok
click.message.my.apartmentguide.com 1 2025-09-09 2025-09-09 ok
pages.message.my.apartmentguide.com 1 2025-09-08 2025-09-08 ok
view.message.my.apartmentguide.com 1 2025-09-08 2025-09-08 ok

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