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.

15 hosts · 238 ms

HostCertsFirst seenLast seenDNS
palisade.email 20 2025-10-03 2026-09-17 ok
*.palisade.email 16 2025-10-03 2026-09-17 —
elink645.palisade.email 12 2026-04-15 2026-08-11 ok
build.palisade.email 20 2026-05-30 2026-09-25 ok
send.palisade.email 4 2026-06-01 2026-09-18 ok
builtwith.palisade.email 12 2026-05-08 2026-09-02 ok
api.palisade.email 1 2026-02-11 2026-02-11 ok
main.palisade.email 7 2026-05-24 2026-08-16 ok
developer.palisade.email 6 2026-05-04 2026-07-10 ok
*.developer.palisade.email 2 2026-07-10 2026-07-10 —
docs.palisade.email 11 2026-05-24 2026-09-19 ok
assets.palisade.email 2 2026-02-25 2026-07-13 ok
accounts.palisade.email 10 2026-05-05 2026-09-01 ok
mta-sts.palisade.email 13 2025-09-16 2026-09-25 ok
www.palisade.email 2 2026-07-02 2026-09-03 ok

Programmatic access, with DNS A records: API GET /v1/hosts/palisade.email (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/palisade.email.