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 · 259 ms

HostCertsFirst seenLast seenDNS
cataloghouse.co.jp 2 2026-04-22 2026-04-22 nodata
*.cataloghouse.co.jp 2 2026-04-22 2026-04-22 —
gitlab.cataloghouse.co.jp 3 2026-06-01 2026-08-20 nxdomain
twww.rcrlg9dc.cataloghouse.co.jp 3 2026-06-01 2026-08-20 nxdomain
cloud.mlsnd.cataloghouse.co.jp 1 2026-02-20 2026-02-20 ok
image.mlsnd.cataloghouse.co.jp 51 2026-02-20 2026-10-05 ok
click.mlsnd.cataloghouse.co.jp 1 2026-02-20 2026-02-20 ok
view.mlsnd.cataloghouse.co.jp 1 2026-02-20 2026-02-20 ok
research.mailmag.cataloghouse.co.jp 3 2026-06-01 2026-08-20 ok
vpshjwgjk.cataloghouse.co.jp 1 2025-12-18 2025-12-18 ok
recom.cataloghouse.co.jp 1 2026-10-06 2026-10-06 nodata
lp.cataloghouse.co.jp 3 2026-05-08 2026-08-26 ok
cms.cataloghouse.co.jp 3 2026-06-01 2026-08-20 nxdomain
thoreau.cataloghouse.co.jp 3 2026-06-01 2026-08-20 ok
tthoreau.cataloghouse.co.jp 3 2026-06-01 2026-08-20 ok
sv.cataloghouse.co.jp 3 2026-06-01 2026-08-20 nxdomain
tsv.cataloghouse.co.jp 3 2026-06-01 2026-08-20 nxdomain
www.cataloghouse.co.jp 12 2026-05-14 2026-09-10 ok
cms.www.cataloghouse.co.jp 3 2026-06-01 2026-08-20 nxdomain
twww.cataloghouse.co.jp 3 2026-06-01 2026-08-20 ok

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