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 · 309 ms

HostCertsFirst seenLast seenDNS
adwebtech.com 7 2025-09-22 2026-09-09 ok
*.adwebtech.com 5 2025-09-22 2026-09-09 —
devapi.adwebtech.com 5 2026-06-02 2026-09-20 ok
link.adwebtech.com 5 2026-05-12 2026-09-09 ok
dnspanel.adwebtech.com 4 2026-04-16 2026-08-16 nxdomain
access.adwebtech.com 10 2026-05-12 2026-09-09 ok
www.adwebtech.com 3 2026-02-23 2026-02-23 ok
relay.adwebtech.com 3 2026-07-07 2026-09-05 ok

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