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.

29 hosts · 220 ms

HostCertsFirst seenLast seen
mercari.jp 17 2025-09-22 2026-10-08
*.mercari.jp 21 2025-08-25 2026-10-08
api-osaka.mercari.jp 20 2026-04-26 2026-08-23
*.api-osaka.mercari.jp 8 2026-04-26 2026-08-22
cmstool.qa.mercari.jp 5 2026-04-23 2026-10-01
frontend.mercari.jp 16 2026-05-05 2026-09-10
*.frontend.mercari.jp 8 2026-05-05 2026-08-31
api.mercari.jp 15 2026-05-19 2026-09-26
ip-db-api.mercari.jp 4 2026-04-16 2026-09-25
ipr-db-api.mercari.jp 3 2026-04-29 2026-08-16
geoip-api.mercari.jp 3 2026-05-08 2026-08-22
shoppingagent-api.mercari.jp 20 2026-04-24 2026-08-20
*.shoppingagent-api.mercari.jp 8 2026-04-24 2026-08-17
*.api.mercari.jp 9 2026-05-31 2026-09-26
pascal.mercari.jp 9 2026-04-12 2026-08-25
cmstool.mercari.jp 3 2026-05-24 2026-09-07
campaign.mercari.jp 3 2026-09-01 2026-09-01
*.campaign.mercari.jp 1 2026-09-01 2026-09-01
bmo.mercari.jp 22 2026-04-27 2026-08-25
*.bmo.mercari.jp 10 2026-04-27 2026-08-23
mcp.mercari.jp 18 2026-04-17 2026-08-20
*.mcp.mercari.jp 8 2026-04-17 2026-08-13
sp.mercari.jp 23 2026-06-05 2026-10-06
*.sp.mercari.jp 13 2026-06-05 2026-10-01
frontend-assets.mercari.jp 16 2026-05-06 2026-09-08
*.frontend-assets.mercari.jp 8 2026-05-06 2026-09-01
cmstool.dev.mercari.jp 5 2026-04-23 2026-10-01
aiw.mercari.jp 4 2026-08-14 2026-08-14
*.aiw.mercari.jp 2 2026-08-14 2026-08-14

Programmatic access: API GET /v1/hosts/mercari.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/mercari.jp.