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.

7 hosts · 238 ms

HostCertsFirst seenLast seenDNS
birminghammidshires.co.uk 13 2025-06-26 2026-09-21 ok
image.emails.birminghammidshires.co.uk 1 2026-02-12 2026-02-12 ok
link.emails.birminghammidshires.co.uk 1 2026-02-11 2026-02-11 ok
links.emails.birminghammidshires.co.uk 2 2025-09-29 2025-10-07 ok
www.birminghammidshires.co.uk 13 2025-07-01 2026-08-06 ok
aws-pre-prod-www.birminghammidshires.co.uk 2 2025-09-11 2026-05-21 ok
aws-prod-www.birminghammidshires.co.uk 2 2026-01-16 2026-05-16 ok

Programmatic access, with DNS A records: API GET /v1/hosts/birminghammidshires.co.uk (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/birminghammidshires.co.uk.