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.

20 hosts · 244 ms

HostCertsFirst seenLast seen
assu2000.fr 3 2026-04-27 2026-08-10
*.assu2000.fr 3 2026-04-27 2026-08-10
1517a2.assu2000.fr 7 2026-05-09 2026-09-07
proximeo-preprod.assu2000.fr 10 2026-04-19 2026-08-15
retour-partenaires-preprod.assu2000.fr 6 2026-07-06 2026-09-03
retour-partenaires-nonprod.assu2000.fr 4 2026-07-09 2026-09-06
agence.assu2000.fr 4 2025-08-25 2026-07-27
proximeo-cie.assu2000.fr 6 2026-04-23 2026-08-19
monespacesante.assu2000.fr 1 2026-05-12 2026-05-12
*.monespacesante.assu2000.fr 1 2026-05-12 2026-05-12
retour-partenaires-recette.assu2000.fr 6 2026-07-06 2026-09-03
retour-partenaires-qualif.assu2000.fr 4 2026-07-06 2026-09-03
tk.assu2000.fr 4 2026-04-19 2026-08-17
sms.assu2000.fr 5 2026-04-17 2026-10-03
espacepaiement.assu2000.fr 6 2026-04-20 2026-08-16
proximeo-gst.assu2000.fr 10 2026-04-22 2026-08-18
retour-partenaires-dev.assu2000.fr 4 2026-07-06 2026-09-03
www.assu2000.fr 11 2026-04-21 2026-08-18
recette-www.assu2000.fr 1 2026-05-06 2026-05-06
dev-www.assu2000.fr 13 2026-05-27 2026-09-23

Programmatic access: API GET /v1/hosts/assu2000.fr (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/assu2000.fr.