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.

24 hosts · 381 ms

HostCertsFirst seenLast seenDNS
rakutenadvertising.com 5 2026-02-17 2026-08-05 ok
*.rakutenadvertising.com 32 2026-02-17 2026-09-24 —
e.rakutenadvertising.com 6 2026-04-23 2026-08-19 ok
landing.rakutenadvertising.com 10 2026-04-22 2026-08-18 ok
blog.rakutenadvertising.com 3 2026-06-04 2026-08-05 ok
bi.rakutenadvertising.com 1 2026-06-09 2026-06-09 ok
cdn.rakutenadvertising.com 3 2026-06-02 2026-09-18 ok
publisher-cdn.rakutenadvertising.com 3 2026-05-01 2026-08-19 ok
mail-events-cdn.rakutenadvertising.com 3 2026-05-21 2026-09-05 ok
go.rakutenadvertising.com 8 2026-04-25 2026-08-21 ok
vip.rakutenadvertising.com 3 2026-06-04 2026-08-05 ok
pubhelp.rakutenadvertising.com 4 2026-06-05 2026-10-03 ok
dmp.rakutenadvertising.com 1 2026-04-20 2026-04-20 nodata
dealmaker.rakutenadvertising.com 4 2026-04-17 2026-08-15 ok
sales.rakutenadvertising.com 5 2026-05-11 2026-09-08 ok
creators.rakutenadvertising.com 2 2025-07-19 2026-06-19 nodata
*.creators.rakutenadvertising.com 2 2025-07-19 2026-06-19 —
devportal-qa-assets.rakutenadvertising.com 3 2026-05-18 2026-09-01 ok
devportal-assets.rakutenadvertising.com 3 2026-05-10 2026-08-26 ok
reports.rakutenadvertising.com 3 2026-05-08 2026-08-26 ok
bi-dev.rakutenadvertising.com 2 2025-08-01 2026-07-07 ok
view.rakutenadvertising.com 2 2025-07-02 2026-06-02 ok
www.rakutenadvertising.com 4 2026-06-04 2026-08-05 ok
ux.rakutenadvertising.com 8 2026-05-06 2026-09-01 ok

Programmatic access, with DNS A records: API GET /v1/hosts/rakutenadvertising.com (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/rakutenadvertising.com.