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.

26 hosts · 307 ms

HostCertsFirst seenLast seenDNS
tegus.com 5 2026-04-13 2026-10-03 ok
*.tegus.com 11 2025-07-13 2026-09-01 —
*.data.tegus.com 1 2026-03-25 2026-03-25 —
web.tegus.com 10 2026-05-06 2026-09-02 ok
*.staging.tegus.com 10 2025-07-15 2026-09-22 —
auth.staging.tegus.com 10 2026-05-01 2026-08-28 ok
experts-auth.staging.tegus.com 10 2026-04-22 2026-08-18 ok
expert-auth.staging.tegus.com 10 2026-05-17 2026-09-13 ok
auth.tegus.com 10 2026-05-11 2026-09-07 ok
experts-auth.tegus.com 10 2026-04-22 2026-08-19 ok
expert-auth.tegus.com 10 2026-05-17 2026-09-13 ok
*.data.internal.tegus.com 1 2026-03-23 2026-03-23 —
*.staging.internal.tegus.com 1 2025-11-13 2025-11-13 —
*.production.internal.tegus.com 1 2025-11-12 2025-11-12 —
*.tools.internal.tegus.com 3 2025-10-21 2026-09-21 —
*.dev.internal.tegus.com 2 2025-11-04 2026-10-05 —
cdn.tegus.com 1 2025-11-19 2025-11-19 ok
track-simon.tegus.com 5 2026-04-24 2026-08-22 ok
*.tools.tegus.com 3 2025-07-10 2026-06-10 —
*.experts.tegus.com 1 2025-12-29 2025-12-29 —
*.dev.tegus.com 12 2025-07-28 2026-10-06 —
auth.dev.tegus.com 10 2026-05-01 2026-08-27 ok
expert-auth.dev.tegus.com 10 2026-05-16 2026-09-12 ok
www.tegus.com 5 2026-04-13 2026-08-16 ok
pay.tegus.com 3 2025-09-18 2026-08-20 nxdomain
www.pay.tegus.com 3 2025-09-18 2026-08-20 nxdomain

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