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.

50 hosts · 352 ms

HostCertsFirst seenLast seenDNS
booklive.jp 2 2026-04-08 2026-04-08 ok
*.booklive.jp 2 2025-10-25 2026-09-24 —
cloud.ma.booklive.jp 2 2026-02-20 2026-02-20 ok
image.ma.booklive.jp 51 2026-02-20 2026-09-09 ok
click.ma.booklive.jp 1 2026-02-20 2026-02-20 ok
view.ma.booklive.jp 2 2026-02-20 2026-02-20 ok
binb.booklive.jp 4 2025-07-07 2026-06-08 ok
github.booklive.jp 1 2026-01-08 2026-01-08 ok
*.d.booklive.jp 3 2025-10-07 2026-09-07 —
dev-binb.d.booklive.jp 2 2026-02-02 2026-02-03 ok
handycomic.d.booklive.jp 2 2025-08-27 2026-07-28 ok
dev-recommend.d.booklive.jp 2 2025-06-11 2026-05-12 ok
k8s-redash.d.booklive.jp 20 2026-01-19 2026-06-22 nodata
dev-g3-capi.d.booklive.jp 1 2026-01-07 2026-01-07 nxdomain
dev-capi.d.booklive.jp 1 2026-02-04 2026-02-04 ok
dev-bsreader.d.booklive.jp 4 2025-10-10 2026-09-10 ok
dev-carrier.d.booklive.jp 1 2026-01-06 2026-01-06 ok
res.d.booklive.jp 2 2025-10-08 2026-09-08 ok
dev-res.d.booklive.jp 3 2025-10-26 2026-09-26 ok
recommend.booklive.jp 2 2025-06-17 2026-05-18 ok
spmode.booklive.jp 1 2025-11-13 2025-11-13 ok
redmine.booklive.jp 3 2026-04-26 2026-09-26 ok
f.booklive.jp 2 2025-07-19 2026-06-17 ok
capi.booklive.jp 1 2025-11-27 2025-11-27 ok
g3-capi.booklive.jp 1 2026-02-06 2026-02-06 nxdomain
*.bl.booklive.jp 2 2026-02-25 2026-07-13 —
stg-binb.bl.booklive.jp 4 2025-07-07 2026-06-08 ok
wintool.cftraining.bl.booklive.jp 3 2026-04-30 2026-09-30 ok
res.cftraining.bl.booklive.jp 2 2025-10-01 2026-09-01 nodata
k8s-redash.bl.booklive.jp 1 2025-11-17 2025-11-17 ok
stg-bsreader.bl.booklive.jp 5 2026-03-28 2026-08-29 ok
dev-res.bl.booklive.jp 2 2025-07-11 2026-06-10 ok
load-test.bl.booklive.jp 1 2026-02-24 2026-02-24 nodata
spmode.load-test.bl.booklive.jp 2 2026-02-26 2026-07-14 nxdomain
*.cf.load-test.bl.booklive.jp 1 2026-01-23 2026-01-23 —
wintool.load-test.bl.booklive.jp 2 2026-04-29 2026-09-29 ok
handy.load-test.bl.booklive.jp 2 2026-02-24 2026-07-12 nxdomain
wintool.booklive.jp 2 2026-04-29 2026-09-29 ok
api.fun.booklive.jp 1 2025-10-30 2025-10-30 nxdomain
faq.booklive.jp 1 2025-11-10 2025-11-10 ok
carrier.booklive.jp 2 2026-03-24 2026-08-24 ok
res.booklive.jp 3 2025-10-23 2026-09-22 ok
*.t.booklive.jp 2 2025-07-23 2026-03-10 —
dev-binb.t.booklive.jp 2 2026-09-02 2026-09-02 ok
github.t.booklive.jp 1 2026-02-16 2026-02-16 ok
spmode.t.booklive.jp 1 2026-03-10 2026-03-10 nxdomain
f.t.booklive.jp 1 2026-04-22 2026-04-22 ok
test-f.t.booklive.jp 1 2026-04-08 2026-04-08 nxdomain
res.t.booklive.jp 2 2025-09-02 2026-08-03 ok
dev-res.t.booklive.jp 2 2025-07-18 2026-06-18 ok

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