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.

18 hosts · 405 ms

HostCertsFirst seenLast seenDNS
williamfry.ie 12 2026-04-08 2026-10-02 ok
*.williamfry.ie 12 2026-04-08 2026-10-02 —
Airdefense.williamfry.ie 1 2026-02-10 2026-02-10 —
www.Airdefense.williamfry.ie 1 2026-02-10 2026-02-10 —
remote.williamfry.ie 2 2025-10-10 2025-10-10 ok
svre1eif.williamfry.ie 1 2026-06-25 2026-06-25 nodata
bh.williamfry.ie 1 2025-11-25 2025-11-25 ok
www.bh.williamfry.ie 1 2025-11-25 2025-11-25 nxdomain
prismcentral.williamfry.ie 2 2025-09-01 2026-09-07 nxdomain
www.prismcentral.williamfry.ie 2 2025-09-01 2026-09-07 nxdomain
interaction.williamfry.ie 1 2025-11-02 2025-11-02 ok
www.interaction.williamfry.ie 1 2025-11-02 2025-11-02 nxdomain
desktop.williamfry.ie 2 2025-10-10 2025-10-10 ok
AAARemoteVserver.williamfry.ie 2 2025-10-10 2025-10-10 —
AAADesktopVserver.williamfry.ie 2 2025-10-10 2025-10-10 —
*.apps.williamfry.ie 1 2026-08-18 2026-08-18 —
mta-sts.williamfry.ie 1 2025-11-23 2025-11-23 ok
storefront.williamfry.ie 2 2025-10-10 2025-10-10 nxdomain

Programmatic access, with DNS A records: API GET /v1/hosts/williamfry.ie (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/williamfry.ie.