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.

8 hosts · 373 ms

HostCertsFirst seenLast seenDNS
mccaffreys.com 8 2025-09-09 2026-09-28 ok
*.mccaffreys.com 2 2025-09-09 2026-09-28 —
url7468.mccaffreys.com 2 2026-09-03 2026-09-03 ok
catering.mccaffreys.com 3 2026-02-24 2026-07-03 ok
help.mccaffreys.com 8 2026-04-15 2026-08-13 ok
qr.mccaffreys.com 4 2026-04-09 2026-08-07 ok
express.mccaffreys.com 14 2026-05-06 2026-08-19 ok
www.mccaffreys.com 5 2026-05-15 2026-09-28 ok

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