Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

18 hosts · 150 ms

HostCertsFirst seenLast seen
thefire.org 13 2025-08-04 2026-10-06
*.thefire.org 5 2025-09-14 2026-10-06
myfire.thefire.org 6 2026-04-28 2026-09-18
archive.thefire.org 2 2025-08-09 2026-07-10
wiki.thefire.org 6 2026-04-28 2026-09-18
control.thefire.org 4 2026-06-08 2026-10-05
join.thefire.org 5 2026-05-04 2026-09-01
learn.thefire.org 14 2026-04-17 2026-10-11
go.thefire.org 10 2026-04-23 2026-09-19
camp.thefire.org 10 2026-05-07 2026-09-02
shop.thefire.org 17 2026-05-27 2026-10-06
email.axioshq.thefire.org 5 2026-05-24 2026-09-21
rankings.thefire.org 11 2026-05-02 2026-09-09
studentpress.thefire.org 6 2026-04-28 2026-09-18
surveys.thefire.org 3 2026-06-10 2026-08-19
itsupport.thefire.org 3 2026-06-16 2026-08-15
rankings-preview.thefire.org 4 2026-06-11 2026-10-09
www.thefire.org 8 2025-08-04 2026-09-18

Programmatic access: API GET /v1/hosts/thefire.org (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/thefire.org.