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.

18 hosts · 303 ms

HostCertsFirst seenLast seenDNS
inextenso-belux.com 7 2026-05-25 2026-09-24 ok
sbc.inextenso-belux.com 1 2025-07-08 2025-07-08 ok
ged.inextenso-belux.com 3 2025-08-27 2026-09-21 nodata
preprod.inextenso-belux.com 5 2026-05-04 2026-09-01 ok
mail.inextenso-belux.com 6 2026-05-09 2026-09-06 ok
eye.mail.inextenso-belux.com 6 2026-05-09 2026-09-06 ok
img.mail.inextenso-belux.com 6 2026-05-09 2026-09-06 ok
click.mail.inextenso-belux.com 6 2026-05-11 2026-09-08 ok
landings.mail.inextenso-belux.com 6 2026-05-09 2026-09-06 ok
forms.mail.inextenso-belux.com 6 2026-05-09 2026-09-06 ok
enterpriseregistration.inextenso-belux.com 2 2025-11-19 2026-06-08 nodata
jobs.inextenso-belux.com 3 2026-06-01 2026-10-01 ok
esignatures.inextenso-belux.com 1 2026-02-24 2026-02-24 ok
clients.inextenso-belux.com 3 2026-06-01 2026-10-01 ok
mta-sts.inextenso-belux.com 5 2026-05-23 2026-09-20 ok
horus.inextenso-belux.com 2 2026-09-21 2026-09-21 ok
intranet.inextenso-belux.com 3 2026-06-01 2026-10-01 ok
www.inextenso-belux.com 5 2026-05-27 2026-09-24 ok

Programmatic access, with DNS A records: API GET /v1/hosts/inextenso-belux.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/inextenso-belux.com.