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 · 412 ms

HostCertsFirst seenLast seenDNS
karkkainen.com 5 2026-04-28 2026-09-28 ok
*.karkkainen.com 3 2026-04-28 2026-09-28 —
lahja.karkkainen.com 1 2026-01-24 2026-01-24 ok
salasana.karkkainen.com 1 2026-09-10 2026-09-10 ok
beta.karkkainen.com 2 2026-05-10 2026-05-10 ok
marketplace.karkkainen.com 6 2026-05-02 2026-10-07 ok
link.uutiskirje.karkkainen.com 5 2026-05-26 2026-09-23 ok
kone.karkkainen.com 4 2026-04-12 2026-08-12 ok
www.kone.karkkainen.com 4 2026-04-12 2026-08-12 ok
img.karkkainen.com 8 2026-04-23 2026-09-29 ok
tuki.karkkainen.com 7 2026-05-28 2026-09-25 ok
lehti.karkkainen.com 8 2026-04-30 2026-09-30 ok
yritysmyynti.karkkainen.com 4 2026-04-12 2026-08-12 ok
link.yritysmyynti.karkkainen.com 5 2026-05-26 2026-09-23 ok
www.yritysmyynti.karkkainen.com 4 2026-04-12 2026-08-12 ok
lahjakortti.karkkainen.com 2 2025-10-14 2026-09-14 ok
autohuolto.karkkainen.com 5 2026-06-02 2026-09-14 ok
kuvat.karkkainen.com 5 2026-05-07 2026-09-06 ok
marketplacetst.karkkainen.com 7 2026-05-02 2026-09-11 ok
tralut.karkkainen.com 3 2026-06-18 2026-08-27 ok
claudegw.karkkainen.com 2 2026-08-10 2026-08-10 nodata
www.karkkainen.com 2 2026-05-10 2026-05-10 ok

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