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.

13 hosts · 253 ms

HostCertsFirst seenLast seen
backmarket.co.jp 35 2026-04-25 2026-10-05
*.backmarket.co.jp 35 2026-04-25 2026-10-05
preprod.backmarket.co.jp 13 2026-05-20 2026-09-15
*.preprod.backmarket.co.jp 13 2026-05-20 2026-09-15
clicks.pro-e.backmarket.co.jp 6 2026-05-11 2026-09-06
dse.backmarket.co.jp 10 2026-04-19 2026-08-15
*.dse.backmarket.co.jp 10 2026-04-19 2026-08-15
kaitori.backmarket.co.jp 4 2026-06-01 2026-09-18
pro.backmarket.co.jp 15 2026-05-19 2026-09-28
press.backmarket.co.jp 2 2026-05-11 2026-05-11
www.press.backmarket.co.jp 2 2026-05-11 2026-05-11
*.dev.backmarket.co.jp 13 2026-05-20 2026-09-15
pro.dev.backmarket.co.jp 18 2026-04-18 2026-10-01

Programmatic access: API GET /v1/hosts/backmarket.co.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/backmarket.co.jp.