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.

13 hosts · 275 ms

HostCertsFirst seenLast seenDNS
trojantechnologies.com 9 2025-09-23 2026-09-09 ok
*.trojantechnologies.com 3 2025-11-15 2026-02-10 —
staging-r3x8n2.trojantechnologies.com 5 2026-05-23 2026-09-26 ok
dev-k7m4q9.trojantechnologies.com 5 2026-05-23 2026-09-24 ok
remote.trojantechnologies.com 1 2025-11-21 2025-11-21 ok
blog.trojantechnologies.com 11 2026-04-24 2026-08-03 ok
www.blog.trojantechnologies.com 3 2026-06-03 2026-08-03 ok
preprod-9f2wqk.trojantechnologies.com 5 2026-05-24 2026-09-27 ok
portal.trojantechnologies.com 10 2026-05-10 2026-09-06 ok
info.trojantechnologies.com 10 2026-04-27 2026-08-24 ok
images.trojantechnologies.com 4 2025-09-23 2025-10-29 ok
punchout.trojantechnologies.com 1 2025-09-23 2025-09-23 nodata
www.trojantechnologies.com 7 2025-09-23 2026-08-04 ok

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