Find every subdomain
of a domain.

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

20 hosts · 310 ms

HostCertsFirst seenLast seenDNS
gogin.co.jp 2 2025-07-15 2026-07-21 nodata
para.ib3.gogin.co.jp 2 2026-02-22 2026-02-22 ok
www.cc0167.biz.ib3.gogin.co.jp 2 2025-12-19 2025-12-19 ok
www.biz.ib3.gogin.co.jp 2 2025-12-19 2025-12-19 ok
para.ib4.gogin.co.jp 2 2025-10-06 2026-09-11 ok
image.mc.gogin.co.jp 1 2026-01-05 2026-01-05 nxdomain
business-loan.gogin.co.jp 2 2025-08-27 2026-07-28 ok
*.business-loan.gogin.co.jp 2 2025-08-27 2026-07-28 —
ecoln.gogin.co.jp 2 2025-08-27 2026-07-28 nodata
*.ecoln.gogin.co.jp 2 2025-08-27 2026-07-28 —
info.gogin.co.jp 1 2025-11-07 2025-11-07 ok
www.info.gogin.co.jp 1 2025-11-07 2025-11-07 nxdomain
app.gogin.co.jp 1 2026-05-11 2026-05-11 ok
moshimo.app.gogin.co.jp 3 2026-05-17 2026-09-30 ok
teigaku.app.gogin.co.jp 1 2026-07-10 2026-07-10 ok
ivr.gogin.co.jp 3 2025-10-16 2026-09-16 ok
adebis.gogin.co.jp 1 2026-01-18 2026-01-18 ok
www.gogin.co.jp 2 2025-07-15 2026-07-21 ok
bcp.az.gogin.co.jp 1 2025-08-20 2025-08-20 ok
www.bcp.az.gogin.co.jp 1 2025-08-20 2025-08-20 nxdomain

Programmatic access, with DNS A records: API GET /v1/hosts/gogin.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/gogin.co.jp.