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.

9 hosts · 290 ms

HostCertsFirst seenLast seenDNS
parealtors.org 16 2025-09-03 2026-09-17 ok
*.parealtors.org 7 2025-09-03 2026-09-13 —
email.parealtors.org 10 2026-04-18 2026-08-20 ok
lp.parealtors.org 10 2026-04-19 2026-08-20 ok
resources.parealtors.org 10 2026-04-19 2026-08-20 ok
mta-sts.parealtors.org 3 2026-05-12 2026-08-03 ok
news.parealtors.org 12 2026-04-18 2026-08-20 ok
smart.parealtors.org 5 2026-04-27 2026-08-25 ok
www.parealtors.org 8 2026-05-21 2026-09-16 ok

Programmatic access, with DNS A records: API GET /v1/hosts/parealtors.org (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/parealtors.org.