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 · 345 ms

HostCertsFirst seenLast seenDNS
ursamajortech.com 9 2025-06-23 2026-08-30 ok
*.ursamajortech.com 2 2025-06-23 2026-07-21 —
ursa-syn-01.ursamajortech.com 2 2025-08-20 2026-08-31 nodata
www.ursa-syn-01.ursamajortech.com 2 2025-08-20 2026-08-31 nxdomain
ursa-syn-02.ursamajortech.com 3 2025-08-20 2026-09-15 nxdomain
www.ursa-syn-02.ursamajortech.com 3 2025-08-20 2026-09-15 nxdomain
printerlogic.ursamajortech.com 2 2025-06-25 2026-07-27 ok
*.printerlogic.ursamajortech.com 2 2025-06-25 2026-07-27 —
home.ursamajortech.com 5 2026-04-28 2026-08-30 ok
se.ursamajortech.com 1 2026-02-03 2026-02-03 nxdomain
*.se.ursamajortech.com 1 2026-02-03 2026-02-03 —
wiki.ursamajortech.com 1 2025-08-20 2025-08-20 nxdomain
www.wiki.ursamajortech.com 1 2025-08-20 2025-08-20 nxdomain
odoo.ursamajortech.com 1 2026-03-27 2026-03-27 nodata
www.odoo.ursamajortech.com 1 2026-03-27 2026-03-27 nxdomain
pyxis.ursamajortech.com 1 2025-11-06 2025-11-06 nxdomain
www.pyxis.ursamajortech.com 1 2025-11-06 2025-11-06 nxdomain
support.ursamajortech.com 2 2026-02-25 2026-07-07 ok
gov-west.ursamajortech.com 2 2026-08-10 2026-08-10 nxdomain
*.gov-west.ursamajortech.com 2 2026-08-10 2026-08-10 —
www.ursamajortech.com 8 2025-09-05 2026-09-12 ok
rocketflix.ursamajortech.com 1 2025-11-03 2025-11-03 nxdomain
www.rocketflix.ursamajortech.com 1 2025-11-03 2025-11-03 nxdomain

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