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.

23 hosts · 413 ms

HostCertsFirst seenLast seenDNS
indium.com 18 2026-01-10 2026-09-24 ok
*.indium.com 6 2025-08-11 2026-09-13 —
ise-hq1.indium.com 6 2025-08-11 2026-09-13 ok
expwy1.indium.com 3 2026-01-10 2026-02-13 ok
www.expwy1.indium.com 3 2026-01-10 2026-02-13 nxdomain
host.www2.indium.com 5 2026-05-28 2026-09-27 ok
activesync.indium.com 1 2026-06-12 2026-06-12 nodata
ise.indium.com 6 2025-08-11 2026-09-13 ok
desktopcentral.indium.com 1 2026-01-05 2026-01-05 ok
www.desktopcentral.indium.com 1 2026-01-05 2026-01-05 nxdomain
webmail.indium.com 1 2026-06-12 2026-06-12 ok
foundation.indium.com 3 2026-04-08 2026-09-29 ok
scp.indium.com 3 2025-09-29 2026-06-25 ok
www.scp.indium.com 1 2025-09-29 2025-09-29 nxdomain
autodiscover.indium.com 1 2026-06-12 2026-06-12 ok
mta-sts.indium.com 2 2026-06-08 2026-08-18 ok
vpn-us.indium.com 2 2026-01-21 2026-02-22 ok
www.vpn-us.indium.com 2 2026-01-21 2026-02-22 nxdomain
sdesk-it.indium.com 1 2025-12-09 2025-12-09 ok
www.sdesk-it.indium.com 1 2025-12-09 2025-12-09 nxdomain
piyovi-gw.indium.com 5 2025-10-02 2025-10-13 ok
www.piyovi-gw.indium.com 5 2025-10-02 2025-10-13 nxdomain
www.indium.com 39 2026-05-29 2026-09-26 ok

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