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.

14 hosts · 298 ms

HostCertsFirst seenLast seenDNS
haarshop.nl 24 2026-02-16 2026-09-19 ok
*.haarshop.nl 17 2026-02-16 2026-09-19 —
hyva.haarshop.nl 2 2026-05-07 2026-05-07 ok
staging.haarshop.nl 4 2026-04-21 2026-08-19 ok
smsbevestiging.haarshop.nl 4 2026-04-29 2026-06-30 ok
mailing.mailing.haarshop.nl 11 2026-05-15 2026-10-04 ok
mailing.email.haarshop.nl 5 2026-05-15 2026-10-04 ok
sgtm.haarshop.nl 2 2026-07-21 2026-09-16 ok
nieuwsbrief-inschrijvingen.haarshop.nl 3 2026-06-04 2026-08-05 ok
smsoptin.haarshop.nl 6 2026-04-29 2026-09-01 ok
migration.haarshop.nl 2 2026-05-20 2026-05-20 ok
development.haarshop.nl 4 2026-04-13 2026-08-11 ok
www.haarshop.nl 7 2026-04-26 2026-08-24 ok
presaleblackfriday.haarshop.nl 2 2026-04-26 2026-04-26 ok

Programmatic access, with DNS A records: API GET /v1/hosts/haarshop.nl (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/haarshop.nl.