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.

45 hosts · 415 ms

HostCertsFirst seenLast seenDNS
biosero.com 6 2026-04-23 2026-09-29 ok
marketplace-2.biosero.com 8 2026-05-25 2026-06-12 ok
portal-2.biosero.com 8 2026-05-22 2026-06-12 ok
olympus-2.biosero.com 6 2026-06-11 2026-06-12 ok
testdocs2.biosero.com 10 2026-05-24 2026-09-19 ok
cloudapi.prod.biosero.com 10 2026-05-12 2026-06-11 ok
cloudapi-internal.prod.biosero.com 8 2026-05-12 2026-06-11 ok
asgaard.biosero.com 8 2026-06-03 2026-10-01 ok
marketplace.biosero.com 13 2026-04-22 2026-08-30 ok
stage.biosero.com 5 2026-05-11 2026-09-28 ok
license.biosero.com 8 2026-04-22 2026-05-12 nxdomain
www.license.biosero.com 2 2026-04-22 2026-04-22 ok
graph.biosero.com 10 2026-04-22 2026-05-12 nxdomain
cloudapi.biosero.com 5 2026-06-12 2026-08-11 ok
helpdesk.biosero.com 4 2026-04-09 2026-08-07 ok
cloudapi-internal.biosero.com 7 2026-06-12 2026-08-11 ok
portal.biosero.com 11 2026-04-22 2026-08-30 ok
login.biosero.com 2 2026-01-08 2026-05-27 ok
fortinet-vpn.biosero.com 1 2026-06-03 2026-06-03 ok
www.fortinet-vpn.biosero.com 1 2026-06-03 2026-06-03 nxdomain
olympus.biosero.com 17 2026-04-22 2026-08-30 ok
wifi-auth-connect.biosero.com 2 2026-04-24 2026-04-25 ok
www.wifi-auth-connect.biosero.com 2 2026-04-24 2026-04-25 ok
support.biosero.com 4 2026-04-09 2026-08-07 ok
marketplace-2.dev.biosero.com 7 2026-05-13 2026-09-17 ok
cloudapi-2.dev.biosero.com 5 2026-05-25 2026-09-22 ok
cloudapi-internal-2.dev.biosero.com 5 2026-05-25 2026-09-22 ok
portal-2.dev.biosero.com 9 2026-05-13 2026-09-17 ok
olympus-2.dev.biosero.com 7 2026-05-12 2026-09-17 ok
marketplace.dev.biosero.com 5 2026-05-04 2026-09-01 ok
license.dev.biosero.com 5 2026-05-04 2026-09-01 ok
graph.dev.biosero.com 5 2026-05-04 2026-09-01 ok
auth.dev.biosero.com 5 2026-05-19 2026-09-16 ok
adminui.dev.biosero.com 5 2026-05-19 2026-09-16 ok
portal.dev.biosero.com 5 2026-05-04 2026-09-01 ok
orchestrator-portal.dev.biosero.com 5 2026-05-04 2026-09-01 ok
orchestrator.dev.biosero.com 5 2026-05-04 2026-09-01 ok
unsecure-orchestrator.dev.biosero.com 5 2026-05-04 2026-09-01 ok
conductor.dev.biosero.com 5 2026-05-04 2026-09-01 ok
components.dev.biosero.com 5 2026-05-04 2026-09-01 ok
olympus.dev.biosero.com 16 2026-05-04 2026-09-04 ok
signoz.dev.biosero.com 3 2026-07-23 2026-09-21 ok
www.biosero.com 6 2026-04-23 2026-09-29 ok
pssa-foundry.biosero.com 5 2026-04-13 2026-08-11 ok
signoz.biosero.com 3 2026-07-15 2026-09-13 ok

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