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 · 257 ms

HostCertsFirst seenLast seenDNS
yuh.com 8 2026-03-19 2026-08-25 ok
*.yuh.com 1 2026-03-19 2026-03-19 —
brand.yuh.com 5 2026-04-25 2026-08-29 ok
m.emailing.yuh.com 1 2026-02-04 2026-02-04 nxdomain
res.emailing.yuh.com 1 2026-02-03 2026-02-03 ok
t.emailing.yuh.com 1 2026-02-04 2026-02-04 nxdomain
sgtm.yuh.com 5 2026-04-23 2026-08-21 ok
viewsgtm.yuh.com 5 2026-04-23 2026-08-21 ok
shop.yuh.com 15 2026-04-25 2026-09-02 ok
twint.yuh.com 1 2025-12-03 2025-12-03 nxdomain
staging.twint.yuh.com 1 2025-12-03 2025-12-03 ok
chatbot.yuh.com 2 2025-06-11 2026-07-03 ok
www.yuh.com 2 2026-03-25 2026-08-25 ok
library.yuh.com 2 2025-08-12 2026-07-13 ok

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