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.

13 hosts · 274 ms

HostCertsFirst seenLast seenDNS
discountexperts.com 12 2025-08-08 2026-09-22 ok
*.discountexperts.com 12 2025-08-08 2026-09-22 —
sli.discountexperts.com 2 2025-09-13 2026-08-14 ok
link.discountexperts.com 5 2026-05-21 2026-09-18 ok
link.rcmail.discountexperts.com 5 2026-06-05 2026-10-03 ok
elink.nl.discountexperts.com 4 2026-04-21 2026-08-19 ok
elink.deals.discountexperts.com 6 2026-02-22 2026-08-19 ok
delivery.notifications.discountexperts.com 5 2026-04-10 2026-09-16 ok
delivery.notications.discountexperts.com 3 2026-05-23 2026-09-10 ok
elink.members.discountexperts.com 4 2026-04-21 2026-08-19 ok
elink.offers.discountexperts.com 4 2026-04-21 2026-08-19 ok
delivery.alerts.discountexperts.com 3 2026-05-28 2026-09-14 ok
delivery.support.discountexperts.com 3 2026-05-18 2026-09-01 ok

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