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.

10 hosts · 301 ms

HostCertsFirst seenLast seenDNS
att.jobs 1 2026-06-02 2026-06-02 ok
soc.att.jobs 8 2025-12-10 2026-09-01 ok
inside.att.jobs 17 2026-06-29 2026-09-30 ok
life.att.jobs 2 2026-03-25 2026-08-25 ok
www.life.att.jobs 2 2026-03-25 2026-08-25 nodata
work.att.jobs 8 2026-03-04 2026-09-09 ok
careers.att.jobs 2 2025-11-05 2026-10-05 ok
connect.att.jobs 4 2026-03-04 2026-08-30 ok
soc-test.att.jobs 8 2025-12-10 2026-09-01 ok
www.att.jobs 4 2026-03-04 2026-08-30 ok

Programmatic access, with DNS A records: API GET /v1/hosts/att.jobs (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/att.jobs.