Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

7 hosts · 265 ms

HostCertsFirst seenLast seen
buk.pe 5 2025-06-16 2026-06-08
*.buk.pe 10 2025-06-16 2026-09-25
*.sdlc.buk.pe 1 2026-09-23 2026-09-23
info.buk.pe 6 2026-04-24 2026-08-20
www.info.buk.pe 14 2026-05-19 2026-09-14
supportcenter.buk.pe 5 2026-04-27 2026-08-25
www.buk.pe 7 2026-01-18 2026-08-19

Programmatic access: API GET /v1/hosts/buk.pe (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/buk.pe.