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.

16 hosts · 228 ms

HostCertsFirst seenLast seen
fujissl.jp 1 2026-06-04 2026-06-04
*.fujissl.jp 1 2026-07-23 2026-07-23
go-api-v01.fujissl.jp 1 2025-07-16 2025-07-16
backend.fujissl.jp 1 2025-09-25 2025-09-25
console.fujissl.jp 1 2025-08-08 2025-08-08
store.fujissl.jp 2 2026-01-23 2026-02-09
secure.fujissl.jp 1 2026-04-20 2026-04-20
api.fujissl.jp 1 2025-09-18 2025-09-18
seal.fujissl.jp 1 2025-11-17 2025-11-17
codesign.fujissl.jp 1 2026-01-23 2026-01-23
reseller.fujissl.jp 4 2025-08-19 2025-08-22
product.fujissl.jp 1 2026-01-23 2026-01-23
payment.fujissl.jp 1 2026-01-23 2026-01-23
clientcert.fujissl.jp 1 2026-01-23 2026-01-23
cryptoreport.fujissl.jp 1 2026-01-23 2026-01-23
www.fujissl.jp 2 2025-06-18 2025-06-26

Programmatic access: API GET /v1/hosts/fujissl.jp (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/fujissl.jp.