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.

16 hosts · 330 ms

HostCertsFirst seenLast seenDNS
universalcoin.com 2 2025-08-05 2026-07-13 ok
*.universalcoin.com 2 2025-08-05 2026-07-13 —
data.universalcoin.com 5 2026-04-30 2026-08-28 ok
web.universalcoin.com 1 2026-01-20 2026-01-20 nodata
www.web.universalcoin.com 1 2026-01-20 2026-01-20 nodata
plaid.universalcoin.com 5 2026-05-01 2026-08-29 ok
goldguide.universalcoin.com 5 2026-05-15 2026-09-12 ok
l.universalcoin.com 6 2026-05-06 2026-09-01 ok
login.universalcoin.com 2 2026-04-22 2026-04-22 nxdomain
go.universalcoin.com 4 2026-04-15 2026-08-13 ok
qr.universalcoin.com 5 2026-05-17 2026-09-13 ok
emails.universalcoin.com 1 2025-06-30 2025-06-30 nodata
www.emails.universalcoin.com 1 2025-06-30 2025-06-30 nodata
dt.universalcoin.com 5 2026-05-25 2026-09-22 ok
pay.universalcoin.com 2 2025-08-04 2026-07-13 ok
www.pay.universalcoin.com 2 2025-08-04 2026-07-13 ok

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