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.

22 hosts · 238 ms

HostCertsFirst seenLast seenDNS
ib.saitamaresona.co.jp 4 2025-12-23 2026-06-28 ok
tib.saitamaresona.co.jp 5 2025-11-10 2026-06-28 ok
xtib.saitamaresona.co.jp 4 2025-08-06 2026-06-28 ok
xib.saitamaresona.co.jp 5 2025-08-18 2026-06-28 ok
www.fund.saitamaresona.co.jp 1 2025-12-24 2025-12-24 ok
search.saitamaresona.co.jp 3 2025-08-26 2026-08-26 ok
portal.saitamaresona.co.jp 1 2026-06-01 2026-06-01 ok
www.bk.personalloan.saitamaresona.co.jp 1 2026-06-11 2026-06-11 ok
www.personalloan.saitamaresona.co.jp 1 2026-06-11 2026-06-11 ok
www.info.saitamaresona.co.jp 1 2026-04-13 2026-04-13 ok
td.cc.b-direct.saitamaresona.co.jp 5 2026-03-23 2026-07-16 ok
www.cc.b-direct.saitamaresona.co.jp 5 2026-03-23 2026-07-16 ok
testd.b-direct.saitamaresona.co.jp 5 2026-03-23 2026-07-16 ok
www.b-direct.saitamaresona.co.jp 5 2026-03-23 2026-07-16 ok
1stop-payment.saitamaresona.co.jp 2 2026-01-13 2026-01-13 nodata
api.1stop-payment.saitamaresona.co.jp 2 2026-01-13 2026-01-13 ok
deliver.1stop-payment.saitamaresona.co.jp 2 2026-01-13 2026-01-13 ok
deliver-csv.1stop-payment.saitamaresona.co.jp 2 2026-01-13 2026-01-13 ok
www.1stop-payment.saitamaresona.co.jp 2 2026-01-13 2026-01-13 ok
www.fund.test.saitamaresona.co.jp 3 2026-05-17 2026-09-02 ok
xwww.test.saitamaresona.co.jp 2 2026-06-08 2026-06-08 ok
www.saitamaresona.co.jp 14 2025-09-02 2026-08-20 ok

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